Questions Asked on
February 23, 2014

chemistry
VSEPR theory predicts that the geometry of AsH3 molecule is which of the following. linear trigonal planar trigonal pyramidal tetrahedral please explain the correct answer
asked by Lisa 
Physics
A 5.1–kg block is pulled along a frictionless floor by a cord that exerts a force P = 12 N at an angle θ = 25° above the horizontal, as shown below. (a) What is the acceleration of the block? (b) The force P is slowly increased. What is the value of P
asked by Chrxeyshthoufov 
chemistry
given the following electronegativities Na=0.9, H=2.1, Cl=3.0 which of the following statements is true? H2,Cl2, and HCl are polar covalent molecules NaCl is a polar covalent compound and HCl is an ionic compound HCl is a nonpolar covalent compound and Cl2
asked by Dee Dee 
Physics  check answers
1. In moving an object of mass 10 kg through a distance of 8.0 m, 40 J of work is done. The average force exerted is? my answer: 320N 2. What is the kinetic energy of a 20 kg object moving at a speed of 10 m/s? my answer: 1000J 3. the gravitational
asked by Lisa 
chemistry
which of the following linear molecules is a nonpolar molecule containing polar bonds? HC=N between C and N are three lines O=C=O HCl N=N between N and N are three lines Please explain... I am having a hard time comprephening this stuff. Thanks
asked by Dee Dee 
chemistry
Electronegativity is a concept that is useful along with other concepts in predicting the polarity of a bond deciding how many electrons are involved in a bond formulating a statement of the octet rule determining the charge on a polyatomic ion
asked by Lisa 
Spanish
Fill in the blanks with questions based on the cues. Remember to use correct capitalization and punctuation. can someone please check my homework 1. ¿? / no / estudiar / tú / en la biblioteca / hoy / por qué A. ¿ Por qué tú no estudiar hoy en la
asked by Amy 
chemistry
Sixteen electrons are present in the Lewis structure of which of the following molecules? CO2 N2O SO2 more than one correct response no correct response If more than one correct response please show all correct answers thank
asked by Johnny 
Math
a rope swing is attached to tree overlooking the river. if the rope is 38 feet in length and swings through an angle of 200 degree, find the total distance to the nearest feet, traveled by someone sitting on the seat when the swing angle described is the
asked by Ananya 
Physics  check answers please
1. In moving an object of mass 10 kg through a distance of 8.0 m, 40 J of work is done. The average force exerted is? my answer: 320N 2. What is the kinetic energy of a 20 kg object moving at a speed of 10 m/s? my answer: 1000J 3. the gravitational
asked by Lisa 
home economics
Use the Expenditure Equation for GDP (GDP = C + 1 + G + XN). Using your research skills, find the values for each sector for the years 1929 and 1933. Determine the percentage change for the two years. Explain the drastic change and what this meant for the
asked by Anonymous 
General Chem
If I want to prepare 5.0 liters of a 0.25 M solution of NH4Cl, how many grams of the salt should I weight out?
asked by Krew 
Chem Bronsted bases
Which of the following substances can act as a Bronsted base in aqueous solution? (Select all that apply.) H2O NH3 H2 CH3NH2 O2 PH41+ CO32
asked by Elizabeth 
chemistry
which of the following diatomic molecules contains the bond of greatest polarity? N2 Cl2 ClI BrF please explain why having a real hard time comprehending this stuff thanks
asked by Dee Dee 
Chemistry  check answers
Can someone please check my answers and make sure they're correct? A) How much heat would it take to raise the temperature of 46.0 g of water from 90.0 to 100.0 C? Answer using correct sig figs, sign, and units. My answer: +1.92x10^3 J B) How many joules
asked by Amanda 
chemistry
in which of the following pairs of compounds are both members of the pair molecular compounds? PCl3 and LiBr CCl4 and KOH NaH and CaF2 more than one correct response no correct response if more than one response please show all the correct answers thanks
asked by Johnny 
physics
A football is thrown from the edge of a cliff from a height of 22 m at a velocity of 18 m/s [39degrees above the horizontal]. A player at the bottom of the cliff is 12 m away from the base of the cliff and runs at a maximum speed of 6.0 m/s to catch the
asked by Louis 
Chemistry
Given these standard reduction potentials at 25 C 1. Cr3+ + e ===> Cr2+ E1=0.407 V 2. Cr2+ + 2e ===> Cr(s) E2=0.913 V determine the standard reduction potential at 25C for the halfreaction equation Cr3+ + 3e ===> Cr(s) E=? When I tried, I got 1.08V
asked by Bridget 
Statistics
Fill in the blanks with the appropriate raw score, z score, t scores . Mean =50, sd = 5. Raw 35
asked by Saf 
chemistry
Copper(II) chloride and lead(II) nitrate react in aqueous solutions by double replacement. Write the balanced chemical equation, the overall ionic equation, and the net ionic equa tion for this reaction. If 10.27 g of copper(II) chloride react, what is
asked by jan 
Spanish
write four different questions in spanish for the following sentence. 1. La profesora Gutierrez ensena contabilidad. 2. Ustedes necesitan hablar con el profesor de economia. 3. carlos busca el libro de arte. 4. Mariana canta en el coro de la universidad.
asked by Amy 
English
Are Lincoln and Kennedy inaugural addresses relevant today?
asked by Nica 
a
A rectangle is 3times as long as it is wide the perimeter is 60cm. Find the dimensions of the rectangle round to nearest tenth if necessary answers are 7.5cm.by22.5cm., 7.5cm.by52.5cm., 20cm.by60cm., 15cm.by22.5cm thanks
asked by Lucky 
statistics
Construct a 95% confidence interval for the population mean. 5. Airfare A random sample of airfare prices (in dollars) for a oneway ticket airfare between two cities MN. Key: 211=211 21  1 2 22  1 1 1 2 3 5 7 8 23  2 3 4 7 7 8 9 9 24  2 3 4 8 8 25 
asked by anna 
Math
If I had two turtles that are 45cm long and they need water how big will my cage be and the water must be 56 inches long?
asked by Asma 
Probability
A player is randomly dealt a sequence of 13 cards from a standard 52card deck. All sequences of 13 cards are equally likely. In an equivalent model, the cards are chosen and dealt one at a time. When choosing a card, the dealer is equally likely to pick
asked by qwerty 
chemistry
what is the geometry of the molecular compound formed by the reaction of sulfur with hydrogen? linear angular trigonal planar tetrahedral please explain the correct answer
asked by Lisa 
algebra
Name the property of real numbers illustrated by the equation 2·(8·7)=(2·8)·7 answers are. Distributive property ,associative property multiplication, Communicative property multiplication, Associative property addition
asked by maddy 
algebra
Solve the inequality graph the solution set 26+6b>2(3b+4) answers are. All real numbers, b11/2, no solution thanks
asked by Lucky 
AP style
Does anyone know if north central is hyphenated AP style? my book doesn't really specify.
asked by blaze 
Finance
Find the APR, or stated rate, in each of the following cases EAR: 12.4 semianually 13.3 monthly 11.0 weekly 14.7 infintely
asked by Jade 
math
convert 20 pounds to kilograms then round to the nearest tenth
asked by Lisa 
Accounting
An example of a committed fixed cost would be: a) taxes on real estate b) management development programs c) public relations d) advertising programs
asked by Morgan 
world history
what were some similarities in the responses of the Chinese and Japanese to European invasion in the 19th century?
asked by Anonymous 
Chemistry
which of the following sets of elements is arranged in order of decresing electronegativity? O,S,As Cl, B, CL Br, Cl, P Be, C, O please explain correct answer
asked by Lisa 
Chemistry
The halflife for the firstorder conversion of A to B is 56.5 hours. How long does it take for the concentration of A to decrease to 10.0% of its original amount? Our professor has given us the answer  188hr but I am not entirely sure how he got it.
asked by Kristen 
Math
A particle is moving along the curve y = 4x^2 + 1 in such a way that the y coordinate is increasing at a rate of ½ units per second. At what rate is the x coordinate changing at the instant x = 2?
asked by Carlos 
Chemistry
The cell diagram for the leadacid cell that is used in automobile and truck batteries is Pb(s) l PbSO4 (s) l H2SO4 (aq) l PbO2(s), PbSO4(s) l Pb (s) where the comma between PbO2 (s) and PbSO4 (s) denotes a heterogeneous mixture of the two solids and the
asked by Bridget 
maths
the line passes through the points s(6,6) and T(0,2) determine the gradient of the line the equation of the line the midpoint of the line segment,TS the length of the line segment,TS
asked by shanise 
Gen.Chem2
what mass(g) of NH3 must be dissolved in 475g of methanol to make a 0.25m solution
asked by Anonymous 
physics
A woman is riding a Jet Ski at a speed of 20 m/s and notices a seawall straight ahead. The farthest she can lean the craft in order to make a turn is 20°. This situation is like that of a car on a curve that is banked at an angle of 20°. If she tries to
asked by Anonymous 
algebra
Is the inequality sometimes,always,never,true 2(2x+9)>4 x+9
asked by tina 
Chemistry
A gaseous hydrogen and carbon containing compound is decomposed and found to contain 85.63% C and 14.37% H by mass. The mass of 258 mL of the gas, measured at STP, was found to be 0.646 g.What is the molecular formula of the compound?
asked by Simone 
chemistry
In the net ionic equation for the neutraliza tion reaction between hydroﬂuoric acid (HF) and sodium hydroxide (NaOH), the HF is rep resented as 1. the molecule, HF. 2. neither the molecule nor the separated ions since it is a spectator in the reaction.
asked by sara 
help me with this language arts.
Multiple Choice Vocabulary 1. Another word for buoyed is (1 point) tired. bothered. lifted. 2. If someone is an optimist, he is generally (1 point) happy. distant. outgoing. disappointed. 3. Something that is nutritious is (1 point) hard to find. good for
asked by josh 
math
The next number in the series 2, 5, 11, 20, 32, 47, is:
asked by Anonymous 
Math
What will be the total deduction for social security and Medicare taxes on Rony's next semimonthly paycheck of $3,960, if she has already earned $42,560 this year? (Social security tax is 6.2% of gross wages up to $106,800. Medicare tax is 1.45% of all
asked by anoymous 
Probability
Alice plays the following game with Bob. First, Alice randomly chooses a set of 4 cards out of a 52card deck, memorizes them, and places them back into the deck. (Any set of 4 cards is equally likely.) Then, Bob randomly chooses 8 cards out of the same
asked by qwerty 
Probability
You are given the set of letters ( A, B, C, D, E ). What is the probability that in a random fiveletter string (in which each letter appears exactly once, and with all such strings equally likely) the letters A and B are next to each other?
asked by qwerty 
accounting
Richard Hamilton has a fast  food franchise and must pay a franchise fee of $35000 plus 3% of gross sales. In terms of cost behavior, the total cost is a: a) variable cost b) fixed cost c) step  fixed cost d) mixed cost
asked by Morgan 
Physics
An exceptional standing jump would raise a person 0.80 m off the ground. To do this, the person must first lower himself about 0.20 m prior to jumping. What force must a 70‒kg person, ready to jump at this position, exert against the ground in order to
asked by Chrxeyshthoufov 
Chemistry
Ik this has been answered, but doesn't the copper oxide have something to do with it? And could you explain it in simpler terms? I'm just confused because you said forget the copper oxide, but your using it somehow, what puzzles me is the carbon dioxide,
asked by Harry 
mat/116
need an expression only to this word problem: An experiment is underway to test the extreme effect of a newly developed liquid. Two hours into the experiment the temperature if the liquid measured to be 17 degrees Celsius. After eight hours of h
asked by csrla 
chemistry
Which of the following statements concerning differences between ionic and molecular compounds is correct? Molecular compounds contains two elements, and ionic compounds contain three of more elements ionic compounds contain oxygen, and molecular compounds
asked by Johnny 
chemistry
In which of the following triatomic molecules or ions are both of the bonds multiple bonds? HCN CO2 NO2 more than one correct response no correct response If more than one correct response then please show all the correct answers. thanks
asked by Johnny 
Chemistryacids
Which of the following substances can act as a Bronsted acid in aqueous solution? (Select all that apply.) NH41+ H2 O2 C4H10 H2CO3 H2SO4 H3O1+
asked by Julie 
sphy011
an egg is thrown directly upward so that it remains in the air for 10 seconds.what is the initial velocity of the egg?
asked by amukelani 
chem
The bond length of RbF is 284.00 pm. What would be the dipole moment, in D, of this compound by assuming a completely ionic bond? Remember e = 1.60x1019 C; 1 D = 3.34x1030 C*m
asked by sara 
physics
you and your friend are riding on a helicopter that is traveling west at a speed of 10 meters per second. You throw a baseball with a velocity of 2 meters per second north, straight across the inside of the helicopter to your friend on the other side. What
asked by rafael 
math
A patient is not allowed to have more than 300 milligrams of cholesterol per day from a diet of eggs and meat. Each egg provides 150 milligrams of cholesterol. Each ounce of meat provides 100 milligrams of cholesterol.
asked by Anonymous 
Chemistry
The activation energy of a certain reaction is 34.9kJ/mol . At 23 ∘C , the rate constant is 0.0190s−1. At what temperature in degrees Celsius would this reaction go twice as fast?
asked by Kat 
college chemistry
A certain metal crystallizes in a facecentered cubic arrangement and has a density of a density and atomic radius of 12.41 g/cm3 and 134.5 pm, respectively. Which element below is it?
asked by hershi 
college ch
CaO has a facecentered cubic unit cell in which the O2 anions occupy corners and face centers, while the cations fit into the hole between adjacent anions. What is its density if the ionic radii of Ca2+, O2 ions are 57.63 pm and 184.0 pm, respectively?
asked by hershi 
math
The total mass of three identical boxes is 28.05 kilograms. What is the mass, in kilograms, of each box?
asked by Jena 
Chemistry
How do I calculate moles from the given litres and mass of the substance (in grams)?
asked by Anonymous 
Reading
How does this passage affect you? “Lief was shown a pocketbook and lampshades made from human skin for Ilse Kich, wife of the commandant" So far I have: This left me in shock that someone would have the idea to skin off someone’s skin and make it into
asked by Ian 
chemistry
My motorcycle has a capacity of 4.5 gal of gasoline. If I combust all of the octane to power my motorcycle, what is the volume of CO2 generated from just my motorcycle on one tank of gas?Assume that I burn all of the gasoline into CO2 on warm day in June,
asked by tricia 
Grammar
Those that were in need of help were lucky to have Christian to assist them. I know the dependent clause is that were in need of help I think the clause is a noun clause Is that correct?
asked by Dakota 
history
1. What was described as the ' hardest work " slaves did ? ( 1point ) A. work in the rice fields B . Work in the tobacco fields C. Work in the lumber business D. Work loading and unloading ships in port 2. which of the follow best describes the social
asked by lovey 
Chemistry
How do I calculate moles from the given litres and mass of the substance (in grams)?
asked by Anonymous 
Chemistry
A 0.670 g sample of impure Al2(SO4)3 reacts with excess BaCl2. If the sample produces 0.760 g of BaSO4, what is the mass percent of Al2(SO4)3 in the sample?
asked by Tevin 
Chemistry
If 16.0 mL of 8.5 ✕ 102 M HClO4 is added to 22.0 mL of 7.6 ✕ 104 M KOH, what is the pH of the solution?
asked by Jessibell 
algebra
Solve the problem by writing an inequality in the perimeter of a rectangular picture frame must be less than 180in. and width is 26in. what must the height of the frame be
asked by tina 
careers in mathematics and physical sciences
wt can i study with maths and physical sciences and life sciences besides engeenering thngs ?please help
asked by masaka cindy 
8th grade science
How many (total) of each atom are there in the reactants and the products of cellular respiration? PLEASE HELP ME
asked by Shawn 
Chemistry
Which of the following substances would be expected to be the strongest electrolyte (best conductor of electricity) in solution with H2O as the solvent? 1. HF 2. BaF2 3. PCl3 4. CH3OH
asked by sara 
accounting
Cash flow information: Direct and indirect methods The comparative yearend balance sheets of Sign Graphics, Inc., revealed the following activity in the company's current accounts:
asked by mary 
math
Ryan was trying to figure out how many column millimeters his advertisement would require. He wanted to sell his motorcycle as quickly as posible, so he was including a picture. If the picture was the width of a column and four centimeters long, how many
asked by Ashton 
Calc Help :(((((
Solve it step by step so I can't do the rest. lim x>infinity (ax^2+b)/(cx+d) Thank you! Answer th
asked by Kris 
chemistry
An aqueous solution is analyzed and found to contain potassium ions and sulﬁte ions. Write the equation for the dissolution of the salt that produced this solution. If the solution contains 0.600 mol of potassium ions, how many moles of sulﬁte ions are
asked by lebanon 
math
Suppose 4y + xy = 2. Evaluate d^2y/dx^2 at the point (3, 2).
asked by cristiana 
physics
A baseball has a mass of about 0.14 kg, and it is pitched towards home plate at a speed of about 46 m/s. If the bat exerts an average force of 9500 N for 1.7 ms, what is the final speed of the ball in m/s?
asked by Jacob Szczepanski 
Computer science
Take two inputs from user: N  #items B  budget. There are S items, each with some price value, out of which user needs to select N items in such a way that total bill does not exceed B. The program should print all such combination of N products.
asked by Joshua 
College Physics
A very long wire carries an I1 = 7.80 A current along the x axis and another long wire carries an I2 = 5.13 A current along the y axis. (I2 is directed upward on the y axis, and I1 is directed to the right on the x axis) What is the magnetic field at point
asked by Amanda 
math
Ship A, 15 miles of 0 is moving west at 20 mile per hour, ship B, 60 miles south of 0 is moving north at 15 mile per hour. are they approaching or separating after 1 hr and at what rate? are they approaching or separating after 3 hrs? when are they nearest
asked by rhavenrock 
Chemistry
In an emission spectroscopy, when trying to identify the most intense emission line for an ion, does one have to identify it using the wavelength and the intensity?
asked by Sandy 
Chem
Calculate ΔG at 25°C for the precipitation of lead(II) chloride from mixing 100. mL of 0.025 M lead(II) nitrate solution with 100. mL of 0.15 M sodium chloride solution. The ΔG° for the reaction at 25°C = −27.36 kJ/mol. (Hint: write out reaction
asked by Anonymous 
physics
A planet has a mass of 5.71 × 1023 kg and a radius of 3.93 × 106 m. (a) What is the acceleration due to gravity on this planet? (b) How much would a 61.8kg person weigh on this planet?
asked by lawrenvceshrenk 
math
18st^5/12st^3
asked by staci 
Personal Finance
1. You hold 20 shares of stock worth $12.75 per share on June 1. Over the next 12 months you receive total dividends of $.055 per share. On June 1 of the following year, each share is worth $12.95. a. Dividend return:  b. Appreciation/Deprecation:  c.
asked by Anonymous 
Chemistry
aluminum reacts with sulfuric acid to produce aluminum sulfate and hydrogen gas. how many grams of aluminum sulfate would be formed if 250 g H2SO4 completly reacted with aluminum
asked by Marcus 
history (Declaration)
How do you see the ideas in the Declaration compared to typical Medieval European?
asked by Sarah 
math
the ratio of width to length of a television scree in 3:4. What is the width of the screen if the length is 32 inches
asked by Thomas 
U.S History  Pls check my answer :)
Document A: It is impossible that the allied powers should extend their political system to any portion of either continent without endangering our peace and happiness; nor can anyone believe that our southern brethren, if left to themselves, would adopt
asked by Cassidy 
math
Sighting the top of a building, a surveyor measured the angle of elevation to be 60°. The measurement is taken 200 feet from the building. Find the building’s height. Express your answer in terms of feet and then round to two decimal places
asked by sean 
Chemistry
Determine [Zn2 ], [CN–], and [HCN] in a saturated solution of Zn(CN)2 with a fixed pH of 2.640. The Ksp for Zn(CN)2 is 3.0 × 10–16. The Ka for HCN is 6.2 × 10–10. I need to know what equations to use to find the answer not just how to get it
asked by Sonya 
Spanish
I am not taking a Spanish class, but I am reading a story with Spanish words in it. There is only one word and one two word phrase. The following are those. 1. abuelito 2. Está muerto Please help me with the following, I do not know what they mean. Also,
asked by Brady 
trig
Use a calculator to find: θ if θ = csc1 1.7516. θ = _____°. Round to three decimal places.
asked by skye 
Science
Copper Oxide + Carbon > Copper + Carbon Dioxide Calculate the mass of carbon needed to obtain 63.5g of copper from 79.5g of Copper Oxide
asked by Harry 
Science
Copper Oxide + Carbon > Copper + Carbon Dioxide Calculate the mass of carbon needed to obtain 63.5g of copper from 79.5g of Copper Oxide
asked by Harry 
math
20%is less than 32
asked by sara 
Math
If I had two turtles that are 45cm long and they need water how big will my cage be and the water must be 56 inches long?
asked by Asna 
busmath
Oakwood Plowing company purchased two new plows. In 170 days they must make a payment of $24,330.00 to pay for them. As of today they have $23,600 what rate of interest will be needed.
asked by help please 
Probability
A group of 90 students is to be split at random into 3 classes of equal size. All partitions are equally likely. Joe and Jane are members of the 90student group. Find the probability that Joe and Jane end up in the same class.
asked by qwerty 
Probability
The newest invention is a threesided die. On any roll of this die, the result is 1 with probability 1/2, 2 with probability 1/4, and 3 with probability 1/4. Consider a sequence of six independent rolls of this die. 1. Find the probability that exactly two
asked by qwerty 
Math
Can someone please explain to me exactly what type of math this is (e.g. radicals, linear equations) and how I would go about solving this?
asked by Anonymous 
Statistics
Summarize the steps involved in analyzing the results of a onesample experiment.
asked by jamie 
Physics
A bullet of mass kg moving at 500 m⁄s embeds itself in a large, fixed piece of wood and travels 6 cm before coming to rest. Assuming that the deceleration of the bullet is constant, find the force exerted by the wood on the bullet.
asked by Chrxeyshthoufov 
Ethics
Which philosopher argued that women are defective males? Answer a. Thales of Miletus. b. Plato. c. Socrates. d. Aristotle.
asked by Angel 
Physics
A 5 kg block is placed on top of a 10 kg block as shown above. A horizontal force of 45 N is applied to the 10 kg block, while the 5 kg block is tied to the wall. The coefficient of kinetic friction between the moving surfaces is 0.20. Determine (a) the
asked by Chrxeyshthoufov 
Physics
A 4.8‒kg block on a 39° inclined plane is acted on by a horizontal force of 46 N as shown below. The coefficient of kinetic friction between the block and the plane is 0.33. (a) What is the acceleration of the block if it is moving up the plane? (b)
asked by Chrxeyshthoufov 
Physics
The horizontal force F, shown in the figure above, accelerates the 4‒kg block at 1 m/s2 to the right. Assume that the coefficient of kinetic friction is 0.5 for both blocks. Given that the 5‒kg block moves up the slope, find (a) the magnitude of the
asked by Chrxeyshthoufov 
ethics please help
Which of the following is associated with the Heinz dilemma? a. Lawrence Kohlberg. b. Jean Rousseau. c. Immanuel Kant. d. None of the above.
asked by Angel 
Physics
An airplane is flying in a horizontal circle at a speed of 482 km⁄h. The wings of the plane are tilted at 38.2° with respect to the horizontal as shown in the figure below. Find the radius of the circle in which the plane is flying. Assume that the
asked by Chrxeyshthoufov 
physics
how far does a wave travel in one period?
asked by lisa 
Physics
A governor (centrifugal pendulum) consists of two 200–g spheres attached by light, rigid 10.0–cm rods to a vertical rotating axle. The rods are hinged so that the spheres swing out from the axle as they rotate with it. However, when the angle θ is
asked by Chrxeyshthoufov 
social studies
In 1846, the population of San Francisco, California, was only 200. By 1852, the city's population was 36,000. Which contributed the most to San Francisco's population change? (5 points) The Gold Rush The MexicanAmerican War The Monroe Doctrine The Trail
asked by Christian 
Physics
A 1.34‒kg ball is attached to a rigid vertical rod by means of two massless strings each 1.70 m long. The strings are attached to the rod at points 1.70 m apart. The system is rotating about the axis of the rod, both strings being taut and forming an
asked by Chrxeyshthoufov 
Physics
A banked circular highway curve is designed for traffic moving at 90 km/h. The radius of the curve is 70 m. If the coefficient of static friction is 0.30 (wet pavement), at what range of minimum and maximum speeds can a car safely make the curve?
asked by Chrxeyshthoufov 
chemistry
A gas with a volume of 6.65 L at a pressure of 1.22 atm is allowed to expand until the volume raises to 54 L. What is the new pressure (in atm)?
asked by david 
Chemistry
In this experiment absorption spectroscopy is conducted to detect Cr(VI)in aqueous solutions and with it the concentration of Cr(VI). How would each of the following affect the Cr(VI) concentration determined in this experiment? Explain the answer. 1. A
asked by Sandy 
add maths
f(x)=3x^212x+20 Find minimum value and value of x
asked by mandy 
Chemistry
A volume of 5oo ml of potassium sodium tartrate solution S1 of c1=0.21mol/l is to prepared. Determine the mass of hydrated potassium sodium tartrate of formula KNaC4H4O6.4H2O needed for this preparation .(molar atomic masses : H=1;C=12;O=16;Na=23;K=39)
asked by Roro 
chemistry
A sample of helium gas has a volume of 328 mL at 0.69 atm. What pressure is needed to reduce the volume at constant temperature to 32 mL?
asked by john 
physical since,pure maths,life science
wt cn i become? except all de engineering thngs?plz help
asked by masaka cindy 
chemistry
Which of the following is a molecular compound that contains five atoms per molecule? germanium tetrabromide dinitrogen monoxide dinitrogen pentoxide nitrogen diselenide please explain. I am having a very hard time comprehending this stuff thanks
asked by Dee Dee 
math class
Find the slope of the tangent line to the graph y = x^3 at the point (0.5, 8). 48 12 4 16
asked by liana 
chemistry
the correct name for the compound H2Te is hydrogen telluride dihydrogen telluride dihydrogen monotelluide hydrogen monotelluride please explain why. I am having a very hard time comprehending this stuff. Thanks
asked by Dee Dee 
L.o
warn teenagers on the ways social media might change their relationships and behaviour, suggest strategies they can use to benefit from socia media
asked by masaka cindy 
Math
The diameter is 6 2/5 ft. What is the area
asked by Shawn 
chemistry
the number of nonbonding electrons exceeds the number of bonding electrons in the Lewis structure of which of the following molecules? HCN NH3 H2O more than one correct response no correct response if more than one correct response please show all correct
asked by Johnny 
physics
An canon ball is launched from ground level directly upward at 39.2 m/s. For how long is the canon ball at or above a height of 34.3 meters?
asked by Anonymous 
physics
10. A large stone block has been loaded in the bed of a dump truck. The bed is slowly raised until it makes an angle of 30 degrees with the horizontal; at this point, the block starts to slide downward. What is the coefficient of static friction between
asked by Rylan 
L.0
warnings and benefits of teenagers frm social media
asked by masaka cindy 
Chemistry
If you use the lmax during the calibration plot (Beer's plot) and then change to some other wavelength for the measurement of the sample, how will this affect x?
asked by Kelsey 
Chemistry
If your heating generates soot on the bottom of the crucible, what is the origin of the soot? How will this soot collection affect x?
asked by Kelsey 
Chemistry
How many grams of AL(NO3)3 are produced when 23.5 grams of Aluminum react with 133 mL of 6.5M HCL?
asked by Katie 
Physics
4. A force of 48 N is required to start a 7.8 kg box moving across a horizontal concrete floor. (a) What is the coefficient of static friction between the box and the floor? = (b) Does the coefficent of friction have a unit? A. No, it is a ratio B. No, the
asked by Rian 
chemistry
If 1.87 g of acetic acid(CH3CO2H) reacts with 2.31 g of isopentyl alcohol(C5H12O) to give 2.96 g of isopentyl acetate(C7H14O2), what is the percent yield of the reaction?
asked by robert 
PHYSICS
5. What is the maximum acceleration a car can undergo if the coefficient of static friction between the tires and the ground is 0.24? acceleration max=
asked by sean 
math
100=1.5(1.1^n  1)/1.11 Could you be so nice please and help me find the solution. The answer is 22 but I have whole time different number. I use log on both sides : 100=1.5(1.1^n  1)/1.11 10 = 1.5(1.1^n  1) 10 = 1.65^n  0.5) log 10.5 = n log 1.65 n =
asked by Lucas 
Math
What is the zero of the function x^218x4
asked by Shun 
PHYSICS
6. Dragrace tires in contact with an asphalt surface have a very high coefficient of static friction. Assuming a constant acceleration and no slipping of tires, estimate the coefficient of static friction needed for a drag racer to cover 2.1 km in 8 s,
asked by SHAWN 
chemistry
If 16.0 mL of 8.5 ✕ 102 M HClO4 is added to 22.0 mL of 7.6 ✕ 104 M KOH, what is the pH of the solution?
asked by Elizabeth 
PHYSICS
A 7 kg purse is dropped from the top of the Leaning Tower of Pisa and falls 53 m before reaching the ground with a speed of 17 m/s. What was the average force of air resistance? F =
asked by shanna 
Chemistry
A volume of 5oo ml of potassium sodium tartrate solution S1 of c1=0.21mol/l is to prepared. Determine the mass of hydrated potassium sodium tartrate of formula KNaC4H4O6.4H2O needed for this preparation .(molar atomic masses : H=1;C=12;O=16;Na=23;K=39)
asked by Roro 
calculus
h(t) = 1/3t^3 + 4t^2 + 20t +2, f or > 2
asked by Bo 
math
100=1.5((1.1^(n)  1))/1.11 Could you be so nice please and help me find the solution. The answer is 22 but I have whole time different number. I use log on both sides : 100=1.5((1.1^(n)  1))/1.11 10 = 1.5(1.1^(n)  1) 10 = 1.65^n  0.5) log 10.5 = n
asked by Lucas 
math class
If f (3) = 9 and f ´(3) = 4, find the tangent line to the graph of f when x = 3. y = 4x  3 y = 4x + 21 y = 9x  23 y = 9x + 31
asked by liana 
PHYSICS
A block with a mass of 126 kg is pulled with a horizontal force of F applied across a rough floor. The coefficent of friction between the floor and the block is 0.7. If the block is moving at a constant velocity, what is the magnitude of F applied? F
asked by cris 
ela
in chapter 9 site specific examples ex: ms.maudie is thoughtful of other "only thing i worried about...was all the danger and commotion it caused... this whole neighborhood could have gone up." i did all of them except these please help atticus tie racism
asked by anonymous 
English
Choose the contraction in parentheses ( ) that correctly completes the sentence . 1/ She (don't, doesn't) know what to expect in the United States . Answer: doesn't 2/ Fortunatley, her aunt and uncle ( haven't, didn't) forgotten to meet her plane. Answer:
asked by NAwaf 
chemistryyyy
a. What is the pH of a 6.1 ✕ 105 M Ca(OH)2 solution? b. What is the H3O+ concentration of the solution? I just cant figure out the ionic equation.
asked by Ana 
algebra
Solve the compound inequality2
asked by maddy 
College Chemistry
If your heating generates soot on the bottom of the crucible, what is the origin of the soot? How will this soot collection affect x? x is the mols of waters of hydration
asked by Maggie 
algebra
Show all steps, combine like terms what is a simple form of the expression3(4y+3)+7y
asked by maddy 
Physics
A man driving his car into 20.0 ft garage with a velocity of 20.0mi/h applies the brakes, producing a constant deceleration. Find the smallest deceleration necessary to avoid striking the back wall of the garage. And find how many seconds it takes for the
asked by Jish 
Chemistry
If you use the lmax during the calibration plot (Beer's plot) and then change to some other wavelength for the measurement of the sample, how will this affect x? x is the moles of H20 in the equation
asked by Kelsey 
math
3 1/2% of 200
asked by Angela 
foreign language
Mean of tute¨¤uaewr ibeifslh
asked by vandana 
PHYSICS
A kg block is initially at rest on a frictionless horizontal surface. It is pulled with a constant horizontal force N. How long must it be pulled before its speed is m/s? t pull =
asked by cristy 
PHYSICS
A large stone block has been loaded in the bed of a dump truck. The bed is slowly raised until it makes an angle of 30 degrees with the horizontal; at this point, the block starts to slide downward. What is the coefficient of static friction between the
asked by chris 
math
i don't understand what they are asking me to do when they give me a quhat looks like this (write acute,right,or obtuse for each angle 1.AFD 2.BFD and thers a bunch of line that intersect off to the side
asked by olivia 
chemistry
A 500. mL sample of hydrogen gas is collected over water at 27 °C. The pressure of the hydrogen and water vapor mixture is 78.5 kPa and the vapor pressure of water at 27 °C is 3.6 kPa. What is the partial pressure of the dry hydrogen gas?
asked by Gabby 
Life Orientation
what according to the basic conditions of employment Act applies with regard to the contraventions?
asked by Desiree 
Language art
Though mAny people doubted that the new program would do any real good, it was a very wholesome development
asked by Anonymous 
math
a new 5 mile nature trail is 125% of the length of the original trail.How long is the original trail?
asked by Angela 
Chemistry
how do I calculate theoretical yield?
asked by Anonymous 
Geography
Where is Zhengzhou China located? Is it a urban city in the middle of China?
asked by Blaze 
Mat/116
An experiment is underway to test the effect of extreme temperatures on a newly developed liquid. Two hours into the experiment the temperature of the liquid measured to be 17 degrees celsius. After eight hours of the experiment the temperature of the
asked by Carla 
math
Write 14,060,000,000,000 in scientific notation
asked by Gio 
Math
An architect has allocated a rectangular space of 589ft^2 for a square dining room and a 12ft wide kitchen. Find both the width of the square dining room and the length of the entire rectangular space. The width of the square dining room is _____ft The
asked by Pam 
Chemistry
A volume of 5oo ml of potassium sodium tartrate solution S1 of c1=0.21mol/l is to prepared. Determine the mass of hydrated potassium sodium tartrate of formula KNaC4H4O6.4H2O needed for this preparation .(molar atomic masses : H=1;C=12;O=16;Na=23;K=39)
asked by Roro 
Mat/116
Which set of points are one the line y = 2x  3
asked by Carla 
algebra
Which algebraic expression models the given word phase 40fewer than a number answers are 40+, T+40, 40T, T40
asked by snow 
Literature/English Questions
Please, I am struggling with these. Can someone help me by answering them? Or at least assisting me to? Thank you in advance to anyone who are able to. These questions regard the shortstory "The Secret Life of Walter Mitty." Describe each character's
asked by Anonymous 
Precalculus
Please!! I know I posted this already but there is a typo. There are 49 mice in a pet shop. 30 mice are white. 27 mice are male. 18 mice have short tails. 8 mice are white and have short tails. 11 mice are male and have short tails. 7 mice are male but
asked by Anonymous 
msth
Professor White asked his students to put the number of hours each studied for the final exam on a piece of paper and turn that paper in with the exam. The pieces of paper indicate that students studied 10, 3, 4, 25, 1, 4, 4, 12, 6, 8, and 10 hours. What
asked by Anonymous 
Physics
A canoe has a velocity of 0.480m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.510m/s east relative to the earth. Find the magnitude of the velocity (V(C/R)) of the canoe relative to the river. Also, find the direction of
asked by Rebecca 
U.S History  need help to check my answer!!!
Document B: Every miserable fool who has nothing at all of which he can be proud, adopts as a last resource pride in the nation to which he belongs; he is ready and happy to defend all its faults and follies tooth and nail, thus reimbursing himself for his
asked by Cassidy 
chemistry
CaO has a facecentered cubic unit cell in which the O2 anions occupy corners and face centers, while the cations fit into the hole between adjacent anions. What is its density if the ionic radii of Ca2+, O2 ions are 57.63 pm and 184.0 pm, respectively?
asked by hershi 
physics 1
A speed skater goes around a turn that has a radius of 35 m. The skater has a speed of 14 m/s and experiences a centripetal force of 460 N. What is the mass of the skater?
asked by Anonymous 
math
A box contains 2 white marbles, 3 blue marbles, 7 black marbles and 9 green marbles. Juan takes one marble at time out of the box and without looking at its color puts it in another box. What is the least number of marbles Juan must transfer to the second
asked by nisrin 
algebra
Solve the equation5y9=(y1) answers are1/2, 21/2, 2, 2/4 thanks
asked by snow 
math
In the addition problem find the digit represented by C. Each time a letter appears it represent the same digit. A does not equal 0 (zero). AB AB AB + AB ______ CA please explain your results Thanks
asked by nisrin 
chemistry
My teacher went over it really fast and now I'm just really confused about how to do my homework =( Calculate the cell potential for the following reaction as written at 25C, given that [Cr2+] = 0.821 M and [Ni2+] = 0.0190 M. Cr(s) + Ni2+ (aq) Cr2+ (aq) +
asked by Bridget 
physics
Explain in terms of the conservation of momentum why the ratio of the masses of a bullet and a gun must be carefully considered
asked by karabo 
algebra
Is the following always never sometimes true 14+3 x7=7x+74 x thanks
asked by snow 
algebra
Is the inequality sometimes always never true2(2x+9)>4 x 9
asked by snow 
calculus
Solve for x: r(x)=ln (x+2/x1)
asked by Anonymous 
physics
You are given a 1kg trolley of unknown mass. Explain how the mass of the unknown trolley can be determined if a mass meter scale is not available
asked by karabo 
algebra
Show all steps evaluate the expression for the given value of the variable 5 a+5b,a=6,b=5
asked by Lucky 
business finance
You have saved $15,000 for down payment on a car costing $55,000, and plan to finance the rest with a 5year loan. The dealer is offering you a loan with a monthly payment of $1,050. What effective annual rate of interest is the dealer charging on the loan
asked by sakiss 
algebra
Solve the equation5y9=(y1) answers are1/2, 21/2, 2, ,2/4
asked by Lucky 
ENG1511
paraphrase the sentence, ''To cut a long story short, one day i decided to be a man about my feelings.''
asked by Euneth 
Math
The number of tickets sold each day for an up coming performance of Handel,s Messiah is given by N(x)=0.4x^2+8x+11, where x is the number of days since the concert was first announced. When will daily ticket sales peak and how many tickets will be sold
asked by Pam 
Calc Help :(((((
Solve it step by step so I can't do the rest. lim x>infinity (ax^2+b)/(cx+d) Thank you!
asked by Kris 
physics
A 3.3 kg ball strikes a wall with a velocity of 8.4 m/s to the left. The ball bounces oﬀ with a velocity of 6.8 m/s to the right. If the ball is in contact with the wall for 0.27 s, what is the constant force exerted on the ball by the wall? Answer in
asked by michael 
IT
Write a program that asks for the name of the employee, an hourly pay rate and hours worked. Compute gross pay (hours X rate), withholding tax, and net pay (gross pay minus withholding tax). Withholding tax is computed as a percentage of gross pay based on
asked by ryan 
physics
A penny is placed at the outer edge of a disk (radius = 0.119 m) that rotates about an axis perpendicular to the plane of the disk at its center. The period of the rotation is 1.70 s. Find the minimum coefficient of friction necessary to allow the penny to
asked by Anonymous 
Math
Find the total profit, the maximum value of the total profit, and the value of x at which it occurs when the revenue is given by R(x)=240xx^2 and the cost is given by C(x)=5000+8x.
asked by Pam 
Chemistry
A gas at 54◦C occupies 4.54 L. At what tem perature will the volume be 3.04 L, assuming the same pressure?
asked by john 
Literature/English Questions
Read each of the following passages of descriptions of events from the play. Identify which type of irony is used in each passage or description. Then briefly explain the contrast of contradiction that occurs in each passage. 1. TRAVELER: So, what do you
asked by Anonymous 
Ms. Sue
Can you evaluate my answers in my previous "English/Literature Questions" post? Thank you.
asked by Anonymous 
U.S History  need help to check my answer!!!
Document D: If slavery be wrong, it is justified by the example of all the world. He cited the case of Greece, Rome and other ancient states; the sanction given by France, England, Holland, and other modern states. In all ages, one half of mankind have
asked by Cassidy 
HELP
In the addition problem find the digit represented by C. Each time a letter appears it represent the same digit. A does not equal 0 (zero). AB AB AB + AB ______ CA please explain your results Thanks
asked by nisrin 
HELPPPP
A box contains 2 white marbles, 3 blue marbles, 7 black marbles and 9 green marbles. Juan takes one marble at time out of the box and without looking at its color puts it in another box. What is the least number of marbles Juan must transfer to the second
asked by nisrin 
Social Gerontology
I need an outline for the political embattlement for the aged (exp.,medicaid, medicare, disability, welfare, supplemental security income. Can you help me?
asked by Debbie 
math
x^210x+y^2=k is ta circle tangent to the yaxis for what real number k?
asked by qx 
statistics
Construct a 95% confidence interval for the population mean. 5. Airfare A random sample of airfare prices (in dollars) for a oneway ticket airfare between two cities MN. Key: 211=211 21  1 2 22  1 1 1 2 3 5 7 8 23  2 3 4 7 7 8 9 9 24  2 3 4 8 8 25 
asked by anna 
math
when y varies directly at the square of X, the variation equation is written y= kx square, where K is constitution (a) given that y=50 when x=10,find the value of K. (b) calculate the value of y when X= 30
asked by shanise 
algebra
Show all steps evaluate the expression for the given value of the variable 5a+5b,a=6,b=5thanks
asked by Lucky 
math
y=x^2+6x+k intersects y=x^26xk at just one point. Find k
asked by bx 
Math Systematric Trial
Hey everybody, I really need help solving these math equations. Thank YOU! For helping me! Use Systematic trial to find the value of each variable. a) 5+7c=89 b) 26=5+3e c) 8k16=200 d)5256u=339 Write each sentence as an equation. Solve each equation. a)
asked by Harmony Ann 
Engl1511
Look up all the dictionary entries of the following words and write down the one that is mostly contectually relavant to the text Tenant Intrigue Audacity Oblivious
asked by Costance 
calculus
Find the equation of the tangent line to the ellipse x 2 + 4y 2 = 25 when x = 3 and y < 0. Answer 3x  8y = 7 3x  8y = 25 3x + 8y = 7 3x + 8y = 25
asked by shira 
chemistryyyy
(a) What is the pH of a 6.1 ✕ 105 M Ca(OH)2 solution? (b) What is the H3O+ concentration of the solution? I already know the answer to part A, I just don't understand how you could use that information to find the concentration of H30+ when its not in
asked by Ana 
calculus
Describe the slope of the tangent line to the curve defined by x 2 + xy  y 2 = 5 when x = 2. positive negative zero undefined
asked by shira 
college math
Acrosonic manufactures a model G loudspeaker system in Plants I and II. The output at Plant I is at most 800/month, and the output at Plant II is at most 600/month. Model G loudspeaker systems are also shipped to the three warehouses—A, B, and C—whose
asked by Dee 
college math
CalJuice Company has decided to introduce three fruit juices made from blending two or more concentrates. These juices will be packaged in 2qt (64oz) cartons. One carton of pineappleorange juice requires 8 oz each of pineapple and orange juice
asked by Dee 
physics
A jet flying at 138 m/s banks to make a horizontal circular turn. The radius of the turn is 3810 m, and the mass of the jet is 2.40 × 105 kg. Calculate the magnitude of the necessary lifting force.
asked by Anonymous 
Physics
A light string can support a stationary hanging load of 26.4 kg before breaking. An object of mass m = 3.19 kg attached to the string rotates on a frictionless, horizontal table in a circle of radius r = 0.795 m, and the other end of the string is held
asked by Joe 
calculus
Find the slope of the tangent line to the graph y = x3 at the point (0.5, 8). Answer 48 12 4 16
asked by shira