Questions Asked on
December 14, 2012

Chemistry
are molar heat of vaporization and heat of vaporization the same thing?
asked by Kendra 
math
draw the shape of an icecream cone wrapper when it is slit from the edge to the center point and flattened out
asked by mark 
French
Hi! This is my final French paper and I would be really appreciative if someone could look it over before I turn it in. Merci! Le Mariage de ma Mère et Michael Dans ma vie, je me souviens des évènements plus que les autres, et certains sont plus
asked by Marina 
Chemistry
A solution of potassium hydroxide is in equilibrium with an undissolved solute at 45 degrees Celsius. What will happen to the mass of the potassium hydroxide if the temperature is raised to 50 degrees Celsius? (Given that heat of solution is
asked by Dayton 
Chemistry
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 193.5 ppm and is initially uniform through the thickness of the
asked by Odesa 
Chemistry
(a) Cadmium telluride (CdTe) is a semiconductor witha band gap, Eg, of 1.45 eV. Calculate the value of the absorption edge of this material. Express your answer in meters. (b) Shown below are several % absorption vs. wavelength diagrams. Identify the
asked by Odesa 
Chemistry
A latex balloon, wall thickness 3.091 x 104 m, contains helium at a concentration of 0.31 kg m3. Under these conditions the total surface area of the balloon is 0.11 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 109 m2s1.
asked by Odesa 
Chemistry
Show that a conventional xray generator is incapable of generating xrays of wavelength as low as 1011m. Do this by determining the identity of the target (in atomic number, Z) which would be needed to generate such xrays.
asked by Odesa 
Chemistry
Octane has a vapor pressure of 40 torr at 45.1 degrees Celsius and 400 torr at 104 degrees Celsius. What is its heat of vaporization? (Given R=8.314J/mol*K) Please explain.
asked by Dayton 
Chemistry
(a) Identify the feature below using correct crystallographic notation. i) (2 1 0) ii) (^1 1/2 0) iii) (^2 0 1) iv) (2 ^1 0) v) [2 1 0] vi)[^1 1/2 0] vii) [^2 0 1] viii) [2 ^1 0] (b) Identify the feature below using correct crystallographic notation.
asked by Odesa 
Chemistry
The glass panels of a sky roof need to be coated in order to screen out ultraviolet radiation (10400 nm wavelength) but without color distortion in the visible spectrum. Candidate coating materials are gallium nitride (GaN) with a band gap,Eg, of 3.2 eV,
asked by Odesa 
Chemistry
The diffusion coefficient of silver (Ag) in copper (Cu) has the following values: T (K) D (m2s1) 923 5.42 x 1016 1173 1.34 x 1013 (a) Calculate the activation energy for diffusion of silver in copper. Express your answer in units of J/mol. (b) You have
asked by Odesa 
Chemistry
You are conducting experiments with your xray diffractometer. (a) A specimen of molybdenum is exposed to a beam of monochromatic xrays of wavelength set by the Kα line of silver. Calculate the value of the smallest Bragg angle, θhkl, at which you can
asked by Odesa 
Chemistry
Chemical analysis of a silicon crystal reveals gallium at a level of 3.091X10^2 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free
asked by Odesa 
Chemistry
How could one lower the glass transition temperature of a germate (GeO2) glass? Select all possible ways. i)Increase the cooling rate. ii)Decrease the cooling rate. iii)Add SiO2 to the glass melt. iv)Add CaO to the glass melt.
asked by Odesa 
Chemistry
A formation energy of 1.11 eV is required to create a vacancy in a particular metal. At 777oC there is one vacancy for every 22,200 atoms. At what temperature will there be one vacancy for every 11,100 atoms?
asked by Odesa 
Chemistry
The halflife of a first order reaction is determined to be 85.5 years. How long will it take for the concentration of the reactant to reach 2% of its initial value?
asked by Odesa 
Chemistry
(a) The figure above shows how the energy of a system varies as a chemical reaction proceeds. Match the numbers features labeled on the figure above to their corresponding statements below: energy state of the reactants: 1/2/3/4/5 activation energy of the
asked by Odesa 
Chemistry
What trends the atomic radii of group 2A ?what trends the atomic radii of period 3? Why this trend occurs? Ans Atomic radii of group 2A increases . Atomic radii of period 3 decreases . I don't know how to answer the last question!! Please help me !
asked by Maria 
Chemistry
What trends the atomic radii of group 2A ?what trends the atomic radii of period 3? Why this trend occurs? Ans Atomic radii of group 2A increases . Atomic radii of period 3 decreases . I don't know how to answer the last question!! Please help me !
asked by Maria 
math
The perimeter of the office bulletin board is 24 ft. The perimeter of the sandbox is 1 1/2 times as long. What is the perimeter of the sandbox?
asked by K 
Calcextrema
Find all relative and maximum extrema in ht efunction k(x)=(x^24)^2 on the interval [3,3].
asked by daryl 
english
sally who is sue's mother is 4 times older than sue but in 20 years sally will be older twice.how old is sally and sue
asked by dawid 
maths plse help me..
A school has a hall which is 22 m long and 15.5 m broad . A carpet is laid inside the leaving all around a margin of 75 cm from the walls . Find the area of the carpet and the area of strip left uncovered . If the width of carpet is 82cm ,find its cost at
asked by Anamika 
chemistry
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 244.5 ppm and is initially uniform through the thickness of the
asked by Anonymous 
chemistry
A latex balloon, wall thickness 3.091 x 104 m, contains helium at a concentration of 0.7 kg m3. Under these conditions the total surface area of the balloon is 0.52 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 109 m2s1.
asked by Anonymous 
chemistry
Show that a conventional xray generator is incapable of generating xrays of wavelength as low as 1011m. Do this by determining the identity of the target (in atomic number, Z) which would be needed to generate such xrays.
asked by Anonymous 
chemistry
The glass panels of a sky roof need to be coated in order to screen out ultraviolet radiation (10400 nm wavelength) but without color distortion in the visible spectrum. Candidate coating materials are gallium nitride (GaN) with a band gap,Eg, of 3.2 eV,
asked by Anonymous 
chemistry
You have two specimens of copper, both of them polycrystalline. Specimen A has an average grain size of 3.091 μm, while Specimen B has an average grain size of 7.777 μm. Which specimen will silver diffuse through more quickly? Choose the best
asked by Anonymous 
maths plse help me..
a train leaves kanyakumari for warengel on tuesday at 10:30 a.m if warengel 1586 km from kanyakuri when will it reach there if its speed is 39 km/h.
asked by arjun 
chemistry
You are conducting experiments with your xray diffractometer. (a) A specimen of molybdenum is exposed to a beam of monochromatic xrays of wavelength set by the Kα line of silver. Calculate the value of the smallest Bragg angle, θhkl, at which you can
asked by Anonymous 
chemistry
Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−4 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free
asked by Anonymous 
chemistry
How could one lower the glass transition temperature of a germate (GeO2) glass? Select all possible ways. Increase the cooling rate. Decrease the cooling rate. Add SiO2 to the glass melt. Add CaO to the glass melt.
asked by Anonymous 
chemistry
A formation energy of 1.11 eV is required to create a vacancy in a particular metal. At 777oC there is one vacancy for every 22,200 atoms. At what temperature will there be one vacancy for every 11,100 atoms?
asked by Anonymous 
chemistry
The halflife of a first order reaction is determined to be 65.0 years. How long will it take for the concentration of the reactant to reach 2% of its initial value?
asked by Anonymous 
maths
Find the probability of drawing a diamond card in each of the consecutive draws from a well shuffled pack of cards,if the card drawn is not replaced after the first draw
asked by Robert 
maths plse help me..
A school has a hall which is 22 m long and 15.5 m broad . A carpet is laid inside the leaving all around a margin of 75 cm from the walls . Find the area of the carpet and the area of strip left uncovered . If the width of carpet is 82cm ,find its cost at
asked by angel 
Math, Algrebra II High school
You have 29 coins, the total value of which is $1.77. The number of quarter is eight less than the number of pennies and the rest are nickels. How many of each coin do you have?
asked by Gina 
Chemistry
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 379.0 ppm and is initially uniform through the thickness of the
asked by Joel 
CHEMISTRY HELP PLEASE
2NaN3(s)==>2Na(s) + 3N2(g) How many liters of N2 are produced at STP if the air bag contains 114g of NaN3 ?
asked by Lisa 
chemistry
Shown below are several % absorption vs. wavelength diagrams. Identify the correct diagram for a semiconductor.
asked by Anonymous 
science
Light is shone on a metal and photoelectrons are emitted. Can you tell me the three things from the listbelow which might cause the photoelectron emission to stop. Decreasing the intensity of the light Increasing the frequency of the light Decreasing the
asked by centya 
CHEMISTRY, PLEASE HELP
How could one lower the glass transition temperature of a germate (GeO2) glass? Select ALL possible ways. A)Increase the cooling rate. B)Decrease the cooling rate. C)Add SiO2 to the glass melt. D)Add CaO to the glass melt.
asked by Anonymous 
chemistry
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 165.0 ppm and is initially uniform through the thickness of the
asked by kiril 
chemistry
A formation energy of 1.11 eV is required to create a vacancy in a particular metal. At 777oC there is one vacancy for every 22,200 atoms. At what temperature will there be one vacancy for every 11,100 atoms?
asked by kiril 
chemistry
The halflife of a first order reaction is determined to be 92.0 years. How long will it take for the concentration of the reactant to reach 2% of its initial value?
asked by kiril 
chemistry
Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−8 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free
asked by sofia 
chemistry
Show that a conventional xray generator is incapable of generating xrays of wavelength as low as 1011m. Do this by determining the identity of the target (in atomic number, Z) which would be needed to generate such xrays.
asked by sofia 
Math 5th grade
I am working on reducing fractions. How do I find the answer to 12 over 8?
asked by Miya 
chemistry
The diffusion coefficient of silver (Ag) in copper (Cu) has the following values: T (K) D (m2s1) 923 5.42 x 1016 1173 1.34 x 1013 (a) Calculate the activation energy for diffusion of silver in copper. Express your answer in units of J/mol.
asked by vanesa 
chemistry
You are conducting experiments with your xray diffractometer. (a) A specimen of molybdenum is exposed to a beam of monochromatic xrays of wavelength set by the Kα line of silver. Calculate the value of the smallest Bragg angle, θhkl, at which you can
asked by vanesa 
chemistry
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 165.0 ppm and is initially uniform through the thickness of the
asked by vanesa 
chemistry
A latex balloon, wall thickness 3.091 x 104 m, contains helium at a concentration of 0.35 kg m3. Under these conditions the total surface area of the balloon is 0.57 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 109 m2s1.
asked by lena 
maths plse help me..
a train leaves kanyakumari for warengel on tuesday at 10:30 a.m if warengel 1586 km from kanyakuri when will it reach there if its speed is 39 km/h.
asked by Anonymous 
chemistry
Show that a conventional xray generator is incapable of generating xrays of wavelength as low as 1011m. Do this by determining the identity of the target (in atomic number, Z) which would be needed to generate such xrays.
asked by lena 
chemistry
(a) Cadmium telluride (CdTe) is a semiconductor witha band gap, Eg, of 1.45 eV. Calculate the value of the absorption edge of this material. Express your answer in meters.
asked by lena 
maths
e=square root d/ab,make d the subject
asked by centya 
equivalent
(a+2b+3c)(4a+6b5c)
asked by Anonymous 
public speacking
A good resource person to go to when asking help in conducting research is a(an): A. Internet expert. B. TV reporter. C. librarian. D. insurance agent.
asked by Buster 
Chemistry
Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−4 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free
asked by T 
chemistry
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 141.0 ppm and is initially uniform through the thickness of the
asked by troubled student 
chemistry
A latex balloon, wall thickness 3.091 x 104 m, contains helium at a concentration of 0.87 kg m3. Under these conditions the total surface area of the balloon is 0.87 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 109 m2s1.
asked by troubled student 
chemistry
Show that a conventional xray generator is incapable of generating xrays of wavelength as low as 1011m. Do this by determining the identity of the target (in atomic number, Z) which would be needed to generate such xrays.
asked by troubled student 
chemistry
Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−2 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free
asked by troubled student 
chemistry
How could one lower the glass transition temperature of a germate (GeO2) glass? Select all possible ways. Increase the cooling rate. Decrease the cooling rate. Add SiO2 to the glass melt. Add CaO to the glass melt.
asked by troubled student 
chemistry
A formation energy of 1.11 eV is required to create a vacancy in a particular metal. At 777oC there is one vacancy for every 22,200 atoms. At what temperature will there be one vacancy for every 11,100 atoms?
asked by troubled student 
Physics
Show or prove that tan(θ) = v2/rg
asked by Zakari 
chemistry
(a) Cadmium telluride (CdTe) is a semiconductor witha band gap, Eg, of 1.45 eV. Calculate the value of the absorption edge of this material. Express your answer in meters.
asked by student 
Chemistry
What is the enthalpy of formation of 2C10H22+31O2=20CO2+22H2O
asked by Anonymous 
math 10 pre calculus
12. An avalanche rescue team travels 8.55 km along a snowcovered trail. For the first section, the trail is flat. The team averages a speed of 2.7 km/h. Then, the terrain becomes mountainous and their average speed is only 1.2 km/h. The oneway trip takes
asked by Eric 
chemistry
A latex balloon, wall thickness 3.091 x 104 m, contains helium at a concentration of 0.5 kg m3. Under these conditions the total surface area of the balloon is 0.72 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 109 m2s1.
asked by student 
Stat
Please help with this problem, not sure calculate it. Consider the standard normal distribution and find P(1.5 < Z < 2.35).
asked by Annie 
physics
The sound intensity level at a concert increases from 85 dB to 94 dB when the concert begins. By what factor has the sound intensity increased?
asked by amy 
chemistry
The diffusion coefficient of silver (Ag) in copper (Cu) has the following values: T (K) D (m2s1) 923 5.42 x 1016 1173 1.34 x 1013 (a) Calculate the activation energy for diffusion of silver in copper. Express your answer in units of J/mol.
asked by student 
chemistry
The halflife of a first order reaction is determined to be 72.5 years. How long will it take for the concentration of the reactant to reach 2% of its initial value?
asked by ch 
public speacking
When researching for supporting materials about the impact of violence in the media, it is a good idea to get assistance from this resource. A. Television B. Callin radio C. Librarian D. Personal interview
asked by Buster 
chemistry
A latex balloon, wall thickness 3.091 x 104 m, contains helium at a concentration of 0.5 kg m3. Under these conditions the total surface area of the balloon is 0.72 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 109 m2s1.
asked by student 
physics
A stretched string of length 80 cm has a fundamental frequency of vibration of 400 Hz. What is the speed of the sound wave in the stretched string?
asked by amy 
chemistry
Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−6 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free
asked by lisa 
CHEMISTRY
You are conducting experiments with your xray diffractometer. (a) A specimen of molybdenum is exposed to a beam of monochromatic xrays of wavelength set by the Kα line of silver. Calculate the value of the smallest Bragg angle, θhkl, at which you can
asked by luis 
Math
If52 men can do a piece of work in 35days in how many days 28 men will do it?
asked by Anil 
Chemistry
A latex balloon, wall thickness 3.091 x 104 m, contains helium at a concentration of 0.31 kg m3. Under these conditions the total surface area of the balloon is 0.11 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 109 m2s1.
asked by Paul 
math
The sum of a negative number and its square is 56. What is the number?
asked by LP 
Algebra 2
Suppose you invest $1600 at an annual interest rate of 7.9% compounded continuously. How much will you have in the account after 10 years? A. $35,254.34 B. $3,525.43 C. $3,435.91 D. $17,315.27
asked by Tori 
Algebra 2
Suppose you invest $1600 at an annual interest rate of 7.9% compounded continuously. How much will you have in the account after 10 years? A. $35,254.34 B. $3,525.43 C. $3,435.91 D. $17,315.27
asked by Tori 
chemistry
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 490.5 ppm and is initially uniform through the thickness of the
asked by luis 
Chemistry
Balance the following equation. (for a balanced eq. aA + bB → cC + dD, enter your answer as the integer abcd) MnO4−(aq) + SO32−(aq) + H+(aq) → Mn2+(aq) + SO42−(aq) + H2O(l) i got 2525 and its going in as incorrect Now you get to balance this
asked by Trina 
Math, need help asap
The ramp shown below is used to move crates of fruit to loading docks of different heights. When the horizontal distance AB is 12 meters, the height of the loading dock, BC, is 4 meters. What is the height of the loading dock DE? 12 m 8 m 9 m 15 m
asked by Becca 
chemistry
Show that a conventional xray generator is incapable of generating xrays of wavelength as low as 1011m. Do this by determining the identity of the target (in atomic number, Z) which would be needed to generate such xrays.
asked by kiril 
Jones
In the rhombus, m
asked by Meme 
chemistry
Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−3 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free
asked by luis 
intergrated math 1
x2+7x+10
asked by larry 
CHEMISTRY HELP ASAP
Balance the following equation. (for a balanced eq. aA + bB → cC + dD, enter your answer as the integer abcd) MnO4−(aq) + SO32−(aq) + H+(aq) → Mn2+(aq) + SO42−(aq) + H2O(l) i got 2525 and its going in as incorrect Now you get to balance this
asked by Trina 
Algebra 2
The pH of a liquid is a measure of how acidic or basic it is. The concentration of hydrogen ions in a liquid is labeled [H+]. Use the formula pH = –log[H+] to find the pH level, to the nearest tenth, of a liquid with [H+] about 5.4 x 10–14. A. 14.7 B.
asked by Tori 
physics
A horizontal slingshot consists of two light, identical springs (with spring constants of 37.7 N/m) and a light cup that holds a 1.37kg stone. Each spring has an equilibrium length of 50 cm. When the springs are in equilibrium, they line up vertically.
asked by Anonymous 
Can someone please help me with balancing ASAP
Balance the following equation. (for a balanced eq. aA + bB → cC + dD, enter your answer as the integer abcd) MnO4−(aq) + SO32−(aq) + H+(aq) → Mn2+(aq) + SO42−(aq) + H2O(l)
asked by Trina 
English  Ms. Sue help
I need help with this question i don't understand. Sometimes leaders have to make difficult decisions. Scott chose to pursue his goal of reaching the South Pole despite very dangerous weather conditions. What did he have to consider when making his
asked by antboy 
Algebra 2. Please help ASAP
The pH of a liquid is a measure of how acidic or basic it is. The concentration of hydrogen ions in a liquid is labeled [H+]. Use the formula pH = –log[H+] to find the pH level, to the nearest tenth, of a liquid with [H+] about 5.4 x 10–14. A. 14.7 B.
asked by Tori 
english
Identify what is wrong with each italicized pronoun reference. If the driver hits another car in a moving violation, the cost of your insurance will go up. indefinite pronoun ambiguous reference no specific antecedent
asked by yamilex 
english
Which sentence avoids using a pronoun reference error? Al had a dog with fleas, which he was always scratching. When I called the college, they said they were still accepting applications. When Kara went to help her sister fix supper, she was very angry.
asked by yamilex 
physics
The length of a pipe, closed at one end is is 90 cm. Calculate the frequency of the standing wave. What is the fundamental frequency of the pipe?
asked by amy 
Algebra
How do I solve 14x/5 + 7x = 23
asked by Mae 
physics
In the figure below, the scale on which the 63 kg physicist stands reads 236 N. How long will the cantaloupe take to reach the floor if the physicist drops it (from rest relative to himself) at a height of 2.1 m above the floor? How would you go about
asked by Yes 
physics
An audio speaker at a concert emits sound uniformly in all directions at a rate of 100 W. (i) Calculate the sound intensity experienced by a listener at a distance of 8 m from the speaker. The listener moves back from the speaker to protect her hearing.
asked by amy 
public speacking
When conducting research for supporting materials, it is imperative to remember: A. there is one right source for certain information. B. always to take notes and record. C. always do a personal interview. D. use only the most current source of information
asked by Buster 
public speacking
A hypothetical example is: A. a false example. B. not real but can happen. C. an example used to prove a hypothesis. D. has no place in a speech.
asked by Buster 
Chemistry
The halflife of a first order reaction is determined to be 61.0 years. How long will it take for the concentration of the reactant to reach 2% of its initial value?
asked by yoshii 
CHEMISTRY
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 165.0 ppm and is initially uniform through the thickness of the
asked by dato 
CHEMISTRY
Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−8 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free
asked by dato 
English
I trying to think of some rituals that still be practised today that be harmful, or should not be practiced. or like some that are practiced for wrong reasons. teacher gave us christmas one, and tell us that we forget the real meaning of christmas, and
asked by Mohammad 
CHEMISTRY
A formation energy of 1.11 eV is required to create a vacancy in a particular metal. At 777oC there is one vacancy for every 22,200 atoms. At what temperature will there be one vacancy for every 11,100 atoms? Update: Express your answer in Celsius.
asked by dato 
CHEMISTRY
You are conducting experiments with your xray diffractometer. (a) A specimen of molybdenum is exposed to a beam of monochromatic xrays of wavelength set by the Kα line of silver. Calculate the value of the smallest Bragg angle, θhkl, at which you can
asked by dato 
chemistry
A latex balloon, wall thickness 3.091 x 104 m, contains helium at a concentration of 0.35 kg m3. Under these conditions the total surface area of the balloon is 0.57 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 109 m2s1.
asked by timur 
math
how do I do long division
asked by joe 
physics
The yellow line emitted by a helium discharge tube in the laboratory has a wavelength of 587 nm The same yellow line in the helium spectrum of a star has a measured wavelength of 590 nm. Calculate the speed of the moving star.
asked by amy 
Spanish
Spanish ?? Mandatos informales . Check Please, Answers are on the bottom of the page. 1) Choose the correct informal command for the following verb (Ayudar) ___________ a tu hermano A. Ayudas B. Ayudes C. Ayuda D. Ayude E. Ayudó F. Ayudaba 2) Choose the
asked by Victoria 
public speacking
When conducting research for supporting materials, it is imperative to remember: A. there is one right source for certain information. B. always to take notes and record. C. always do a personal interview. D. use only the most current source of
asked by Buster 
Chemistry;Check?!
Can you check these? Strong attractive forces that keep atoms connected together are called _____. A. valence electrons B. chemical bonds C. cations D. anions Which of the following is NOT a type of bonding that occurs between atoms? A. covalent bonding B.
asked by Victoria 
Spanish, CHECK?
Chose the correct informal command for the following verb (usar) No ______________ mi computadora. A. usas B. usaste C. usarás D. uses E. usa My answer: E
asked by Victoria 
chemistry
Chemical analysis of a silicon crystal reveals gallium at a level of 3.091*10^7 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free
asked by School girl 
chimistry
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 100.0 ppm and is initially uniform through the thickness of the
asked by School girl 
chimistry
A latex balloon, wall thickness 3.091 x 104 m, contains helium at a concentration of 0.82 kg m3. Under these conditions the total surface area of the balloon is 0.39 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 109 m2s1.
asked by School girl 
chemistry
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 165.0 ppm and is initially uniform through the thickness of the
asked by student 
chemistry
A latex balloon, wall thickness 3.091 x 104 m, contains helium at a concentration of 0.35 kg m3. Under these conditions the total surface area of the balloon is 0.57 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 109 m2s1.
asked by student 
chemistry
Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−8 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free
asked by student 
chemistry
A freshman is currently enjoying the Arts Studio program she is pursuing at a wellknown university. In her free time, she likes to skate, take salsa dance lessons, and cook. She particularly enjoys pickling and decides to pickle olives over a leisurely
asked by zachary 
math
The length of a rectangular garden is 4 yards more than the width. The area of the garden is 60 square yards. Find the dimensions of the garden.
asked by LP 
Math
In 10 years, 25% of a radioactive substance decays. What is its halflife? A. 25 years B. 24 years C. 20 years D. 29 years
asked by Darwin12 
SraJMcGin
Is it to personal if I ask if you have an email?! I would like you to check my spanish work before I turn it in to my teacher.
asked by Victoria 
chemisty
1.5 grams hydrogen 12 oxygen 2gram hydrogen 16 gram oxygen 2.5grams hydrogen 20grams oxygen
asked by dionna 
Chemistry
A latex balloon, wall thickness 3.091 x 104 m, contains helium at a concentration of 0.87 kg m3. Under these conditions the total surface area of the balloon is 0.87 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 109 m2s1.
asked by mangozier 
Physical Science
Write a paragraph or two about how and why has the atomic idea/model changed (Greeks 16001930)
asked by Juliet 
chemistry 12
Im doing a worksheet and i had to draw PE diagram which had the Ea(activation energy)at 80kJ and the enthalpy change is 40kJ. *All the reactants and products are gases Then it asks to describe what would happen to the diagram if the temperature dropped 25
asked by Anonymous 
litercy
what of the following is the best wat\y to get to a list of encyclopedias that are available on the web?
asked by Anonymous 
Math
Which of the following is equal to log6(t + 1) − log6(t^2 − 1)? A. log6t − log6t2 B. –log6(t − 1) C. log6t D. log6(t + 1)
asked by Jay 
chemisty
1.5 grams hydrogen 12 oxygen 2gram hydrogen 16 gram oxygen 2.5grams hydrogen 20grams oxygen
asked by dionna 
English
In which sentence is a homonym used correctly? A. I would not want to be there mother. B. He replaced the brake lining. C. Wherever you go, their you are. D. He could not break quickly enough to avoid the accident. I think the answer is "B"
asked by Sandia 
Chemistry
A latex balloon, wall thickness 3.091 x 104 m, contains helium at a concentration of 0.79 kg m3. Under these conditions the total surface area of the balloon is 0.47 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 109 m2s1.
asked by anonymous 
algerbra
If 1 and –6 are two of the roots of 6x^4 + 31 x^3 − 33x^2 − 16x + 12, then what are the other two? A. 2 and 3/2 B. 1 and 6 C. 1/2 and 2/3 D. 2 and 2/3
asked by Bill 
math
If you know only the outside measurements for any retangle, can you find its area? How? why does this method work?
asked by di 
Chemistry
My assignment sheet said to plot a KE distribution diagram where 10% of the molecules meet or exceed the Ea. I know the Ea and enthalpy change. But nothing else so does this mean the diagram is just a estimation of what it would look like.Or am i doing
asked by Sky 
Math
If 1 and –6 are two of the roots of 6x^4 + 31 x^3 − 33x^2 − 16x + 12, then what are the other two? A. 2 and 3/2 B. 1 and 6 C. 1/2 and 2/3 D. 2 and 2/3
asked by Bill 
Math
Find the amount of interest and the monthly payment for the loan. Purchase a car for $42,400 at 2.4% addon rate for 5 years. (Round your answers to the nearest cent.) $_____ interest $_____ per month
asked by Reggie 
Algebra 1 Math
A software company started with 2 employees. In 6 months, the company had 14 employees. The number of employees increased at a steady rate. a. create 2 ordered pairs. b. find the slope. c. Interpret the meaning of the slope. d. Find the prediction
asked by Tony 
English
In which sentence is a homonym used correctly? A. I would not want to be there mother. B. He replaced the brake lining. C. Wherever you go, their you are. D. He could not break quickly enough to avoid the accident. I think the answer is "B"
asked by Sandia 
Math
Which of these rational numbers does the Rational Roots Theorem say can't be a solution to 14x7 + 13x5 − 19x4 + 7x2 − 6x − 21 = 0? A. 3/2 B. 2/7 C. 1 D. (1/2)
asked by Pat 
Algebra 1 Math
At the ocean's surface the pressure is 1 atmosphere. At 66 feet below seal level, the pressure is 3 atmosphere. The Relationship between the pressure and the depth is linear. a. find the independent and dependent variable. b. create 2 ordered pairs. c.
asked by Tony 
Math
Which of the following is not a property of logarithms? A. log(A  B) = logA/logB B. logA + logB = logAB C. xloga = loga^x D. log(b) b^x = x
asked by Pat 
reading anybody know?
3. Which of the following words has a positive connotation? (1 point)childish immature babyish youthful 4. Which of the following sentences is punctuated correctly? (1 point)Is this your key, I found it near your house today? The wind blew the large,
asked by tesj 
Spanish.
PLEASE CHECK? :OO Answers On bottom: A. Chose the right verb to complete the sentence. 1. A Marta ____________ comprar un vestido nuevo. gustaría me gustaría le gustaría te gustaría 2. Yo nunca ____________ esas cosas. diría dirías deciría decirías
asked by Victoria 
Math
On which interval does the Intermediate Value Theorem guarantee that the polynomial x^4 + 7x^2 − 9x − 1 has a root? A. (1/2,0) B. (1/2,1) C. (0,1/2) D. (1,1/2)
asked by Amy 
Physics
a 32 kg child stands at the edge of a circular platform that rotates at w=2rad/s about its center. Mass of platform=60kg, radius=2m. The child walks from the rim towards the center. Find the Angular speed when the child reaches a point 0.500 m from the
asked by Help! 
Math
4 x 2/3 in simplest form
asked by Anonymous 
windows 7
The __________report lists the webpage you are currently accessing and indicates if they have written cookies. A.safety B. Privacy c. protection d.liability
asked by Tam 
Math
There are 9 coins in a piggy bank in terms of dimes and nickels and the value of the dimes is 15 cents more than the value of the nickels. Find out how many of each coin there is.
asked by Anonymous 
chemistry
calculate the number of moles in this quantity: 52.5 mg ZnCl2=?
asked by Anonymous 
Math
Philip has 35 comic books. Of those comics, 2/10 take place in space. How many of Philip's comic books take place in space?
asked by Anonymous 
Math
2/7 x 3/4 simplest form
asked by Anonymous 
Chemistry
Calculate the number of moles in this quantity: 250 ml ethyl alcohol,C2H5OH(=0.789 g/ml)
asked by Anonymous 
Math
7/12 x 4/5 simplest form.
asked by Anonymous 
Math
Evaluate the expression for t • 1/8 for the given value of t. Write the answer in the simplest form. t = 4/9
asked by Anonymous 
Math
7/12 x 4/5 I cant get the answer
asked by Anonymous 
Math
If P(x) is a polynomial with P(–6) = –1.12 and P(–5) = 0.6 then which of the following must be true? A. There is a zero for P(x) between x = –6 andx = –5. B. There is a zero for P(x) between x = –1.12 and x = 0.6. C. There is a zero for P(x)
asked by James 
Chemistry
Solve the following pls. Calculate the number of grams in these quantities: 1. 0.0600 mol HC2H302 2. 4.50 x10^21 molecules glucose C6H2O6
asked by sally 
science
A fixed quantity of gas at 22°C exhibits a pressure of 739 torr and occupies a volume of 5.46 (a) Calculate the volume the gas will occupy if the pressure is increased to 1.74 atm while the temperature is held constant.
asked by Samantha 
Math
On which interval does the Intermediate Value Theorem guarantee that the polynomial x^4 + 7x^2 − 9x − 1 has a root? A. (1/2,0) B. (1/2,1) C. (0,1/2) D. (1,1/2)
asked by Anonymous 
Physics
You are trying to lose weight by working out on a rowing machine. Each time you pull the rowing bar (which simulates the "oars") toward you, it moves a distance of 1.32 m in a time of 1.22 s. The readout on the display indicates that the average power you
asked by John 
Math
Write fraction in simplest form. 25x2/35x
asked by Greg 
Math
On which interval does the Intermediate Value Theorem guarantee that the polynomial x^4 + 7x^2 − 9x − 1 has a root? A. (1/2,0) B. (1/2,1) C. (0,1/2) D. (1,1/2)
asked by Anonymous 
Finance
Heinz Corporation bonds carry a coupon of 8% and will mature in 5 years at $1,000. Newly issued 5year bonds with similar characteristics are yielding 4%. Calculate today's market price of the Heinz bond. Compute your answer, submit all your work, then
asked by dj 
Physics
The drawing shows a skateboarder moving at 6.41 m/s along a horizontal section of a track that is slanted upward by 47.4 ° above the horizontal at its end, which is 0.612 m above the ground. When she leaves the track, she follows the characteristic path
asked by John 
Geometry...HELP
In rectangle KLMN, KM = 6x + 16, and LN = 49. Find the value of x.
asked by BaileyBubble 
7th grade math Ms. Sue please
1. 2(x – 3) = 2x (1 point) one solution no solutions infinitely many solutions 2. 3(y – 3) = 2y – 9 + y (1 point) one solution no solutions infinitely many solutions 3. 10x – 2 – 6x = 3x – 2 + x (1 point) one solution no solutions infinitely
asked by Delilah 
Geometry
LM is the midsegment of trapezoid ABCD. If AB = 46 and DC = 125, what is LM?
asked by BaileyBubble 
physics
Radio waves of frequency 30 kHz are received at a location 1500 km from a transmitter. The radio reception temporarily “fades” due to destructive interference between the waves travelling parallel to the ground and the waves reflected from a layer
asked by amy 
psychology
the goal of psychodynomic therapy is to:
asked by Nardia 
Biology
A person with AB blood type is transfused with type O blood. What happens and why?  The textbook says there will be no immune reaction. I understand that the transfused type O red blood cells have no antigens and the recipient type AB plasma has no
asked by Jessie 
lang arts
12. The young girl was not pressured by what (other children said.) noun clause adverbial clause misplaced modifier adjectival clause
asked by Anonymous 
Geometry
Find the values of the variables and the lengths of the sides of this kite. Side A=y4, side B=x+5,side C= x+12, side D= 2x+5
asked by BaileyBubble 
Geometry
ABCD is a rhombus. Explain why triangle ABC is congruent to triangle CDA.
asked by BaileyBubble 
math
In a right triangle, if sin ø = (5/13), what is the value of csc ø?
asked by confused 
Math
A car dealer carries out the following calculations. What is the annual percentage rate? (Round your answer to the nearest tenth.) List price $5,368.00 Options $1,625.00 Destination charges $200.00 Subtotal $7,193.00 Tax $431.58 Less tradein $2,932.00
asked by Reggie 
math
Calculate the monthly finance charge for the following credit card transaction. Assume that it takes 10 days for a payment to be received and recorded and that the month is 30 days long. (Round your answer to the nearest cent.) $300 balance, 18% rate, $50
asked by Reggie 
English  ms. sue
ms. sue thanks for giving me list of traditions :) you read the story lottery by shirley jackson? i need help with story, i writing essay on traditions and i need to mention story parts.
asked by Mohammad 
physics
A 22 g bullet is accelerated in a rifle barrel 43.2 cm long to a speed of 907 m/s. Use the workenergy theorem to find the average force exerted on the bullet while it is being accelerated. Answer in units of N
asked by Patrick 
Physics
The force required to stretch a Hooke’slaw spring varies from 0 N to 70.4 N as we stretch the spring by moving one end 5.35 cm from its unstressed position. Find the force constant of the spring. Answer in units of N/m
asked by Patrick 
Physics
Find the work done in stretching the spring. Answer in units of J
asked by Patrick 
Science
A spring has a force constant of 50000 N/m. How far must it be stretched for its poten tial energy to be 22 J? Answer in units of m
asked by James 
Physics
A bead slides without friction around a loop theloop. The bead is released from a height of 12.9 m from the bottom of the loopthe loop which has a radius 4 m. The acceleration of gravity is 9.8 m/s2 . A 4m 12.9 m What is its speed at point A ? Answer
asked by Richard 
Earth Science
If sea level has risen by 20 cm over the past century on the coast of North America, by how much do you think it has risen over the past century on the coast of India? Explain.
asked by kayce 
chemistry
1) what mass of lead(ii) acetae is required to be dissolved in a 500.0ml volumetric so that the acetate is equal to 1.48?
asked by Riana 
Earth Science
Explain why the following statement is incorrect: Climatologists use the data from ice cores to directly measure past temperatures.
asked by Kayce 
science
how do i ansewr this question? An aerosol spray can with a volume of 400. mL contains 2.25 g of propane gas (C3H8) as a propellant (a) If the can is at 31°C, what is the pressure in the can? (b) What volume would the propane occupy at STP? (c) The can's
asked by Samantha 
Finance
In 150300 words , What the advantages and disadvantages of consumer credit?
asked by Shannon Stracener 
Physics
A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steampowered catapult. The thrust of its engines is 3.82 x 105 N. In being launched from rest it moves through a distance of 57.2 m and has a kinetic energy of 5.71 x
asked by Ricardo 
7th grade math Ms. Sue please
1. m – 7 < 6 (1 point) m < –1 m > 1 m < 13 m < –13 2. x + 4.5 ≥ 5.5 (1 point) x ≥ 10 x ≥ 1 x ≥ 0.1 x ≤ 1 3. p + 12 > 9 (1 point) p > 21 p > 3 p > –21 p > –3 4. Translate the following statement into an inequality: Five less than a
asked by Delilah 
TO: MS SUE SCIENCE HELP
this question has really stumped me but i have tried doing it and have came up with some possible answers: the following letters list some characteristics OF SOLIDS ACCORDING TO THE KINECTIC MOLECULAR THEORY. A.) the particles are very closely packed
asked by SPIKE 
biology
Traditional phylogenetic results have been challenged by the results of _________________
asked by nancy 
biology
Terms like punctiform and round relate to colonial ____________while smooth and curled relate to colonial___________
asked by nancy 
biology
The ___________ ____________ supplies blood from the heart to all organs except the lungs
asked by nancy 
biology
Following the usual pathway of circulation blood flows from the __________ to ___________, to_____________and to__________
asked by nancy 
TO MS SUE SCIENCE HELP
These are my last 2 questions i need help on.... 1. to determine the density of an irregularly shaped object, a student immersed the object in 21.2 ml of water in a graduated cylinder, causing the level of the water to rise to 27.8 ml. If the object had a
asked by SPIKE 
chemistry
if two solutions are prepared for the reaction.4.62g of Iron(iii)chloride in a 250ml columetric and for the sodium hydroxide,2.50g of solute in a 200ml volumetric flask is mixed.write two equations that describe the dissociatin of the ionic solids in water
asked by Riana 
chemistry
150.0ml of iron(iii)chloride solution is mixed with 180.0ml of the sodium hydroxide solution,1.65g yield of experimental iron(iii)hydroxide is obtained.find the theoretical yeild of the precipitate. how you find that ?
asked by Riana 
physics
During a baseball game, a batter hits a popup to a ﬁelder 64 m away. The acceleration of gravity is 9.8 m/s 2 . If the ball remains in the air for 6.7 s, how high does it rise? Answer in units of m
asked by ra 
physics
Someone in a car going past you at the speed of 43 m/s drops a small rock from a height of 1.6 m. How far from the point of the drop will the rock hit the ground? The acceleration due to gravity is 9.8 m/s 2 . Answer in units of m
asked by ra 
MATH! HELP!
Sean Thomas makes $15.85 per hour. How much would he earn in a fortyhour work week?
asked by Losa 
physics
An Alaskan rescue plane traveling 37 m/s drops a package of emergency rations from a height of 149 m to a stranded party of explorers. The acceleration of gravity is 9.8 m/s 2 . Where does the package strike the ground relative to the point directly below
asked by ra 
Chemistry
The total mass that can be lifted by a balloon is given by the difference between the mass of air displaced by the balloon and the mass of the gas inside the balloon. Consider a hot air balloon that approximates a sphere 5.00 m in diameter and contains air
asked by Savannah 
Math
Sam Quaker receives a salary of $300 per week plus a 5 and 1/2% commission on his sales. Last week he sold $3,880 worth of merchandise. How much did Mr. Quaker make last week?
asked by Rina 
english
1. The Pink Palace's walls was built with pink marble. 2.The Pink Palace's walls were built with pink marble. 3.The Pink Palace's walls is built with pink marble. Which sentence is written correctly #1
asked by Hayden 
English
Which is the best way to write this sentence. Today the Pink Palace Museum has a science center too. 1.Today the Pink Palace Museum is having a science center too. 2.Today the Pink Palace Museum had a science center too. 3.Today the Pink Palace Museum will
asked by Hayden 
science
how many milliliters of 5.5M H2so4 must you use to prepare 500ml of 0.2M sulfuric acid solution? Please hurry!!!!!!
asked by grant 
physics
A 224 g particle is released from rest at point A along the diameter on the inside of a fric tionless, hemispherical bowl of radius 44 cm. The acceleration of gravity is 9.8 m/s2 .
asked by Richard 
HCR/210
I need to find information pertaining to handling aeministrative data that a doctor does NOT need to see.
asked by Sheila 
chemistry
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 263.5 ppm and is initially uniform through the thickness of the
asked by kkr 
chemistry
A latex balloon, wall thickness 3.091 x 104 m, contains helium at a concentration of 0.86 kg m3. Under these conditions the total surface area of the balloon is 0.56 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 109 m2s1.
asked by kkr 
chemistry
150.0ml of iron(iii)chloride solution is mixed with 180.0ml of the sodium hydroxide solution,1.65g yield of experimental iron(iii)hydroxide is obtained.find the theoretical yeild of the precipitate. how you find that ?
asked by Riana