Questions Asked on
May 7, 2013

chemistry
Why would methanol be used to halt a secondary alcohol and catalyst reaction?
asked by Anonymous 
chemistry
Why would methanol be used to halt a secondary alcohol and catalyst reaction?
asked by Anonymous 
English II
"Base Details" If I were fierce, and bald, and short of breath, I’d live with scarlet Majors at the Base, And speed glum heroes up the line to death. You’d see me with my puffy petulant face, Guzzling and gulping in the best hotel, Reading the Roll of
asked by bob 
chemistry
calculate the enthalpy of mixing for the solution of 10% platinum and 90% gold .express your answer in units of kg/mole
asked by himani. 
Math
Two cars run at constant speeds around a onemile racetrack. The faster car passes the slower car every two minutes if the cars run in the same direction. If they run in opposite directions, they meet every 15 seconds. Find the speed of the faster car in
asked by Bob 
chemistry
the solubility of the fictitious compound administratium fluoride in water is 3.091e4.calculate the value of solubility product ksp
asked by himani. 
Math
A woman rides her bicycle from her house to and from a lake. It takes her 1 1/2 hours to ride to the lake and 1 3/4 hours to ride back. She rides downhill at 12 kilometers per hour, on level ground at 8 kilometers per hour, and uphill at 6 kilometers per
asked by Bob 
chemistry
calculate the solubility product of leadchloride in pure water.your answer should be in units of molarity raised to the appropriate exponent.
asked by himani. 
Math
An elevator named L in "63 Building" in Seoul is notorious for its low speed. It takes 3 seconds for L just to move one floor. It takes another 20 seconds for it to have its door open and close automatically. What is even more frustrating, is that the
asked by Bob 
Math (Algebra)
A and B are real numbers such that the two quadratic equations 13x^2 + 3x +2 = 0 and Ax^2 + Bx + 5 = 0 have a common root. What is the value of A+B?
asked by Shin 
maths
1.how many non congruent right triangles with positive integer leg lengths have areas that are numerically equal to 3 times their perimeters? 2.a triangle with side lengths in the ratio 3:4:5 is inscribed in a circle of radius 3.what is the area of the
asked by ramesh reddy 
Math (Algebra)
If f(x) is a polynomial with real coefficients such that f(7+5i) = 39 + 13i, then f(7−5i) = a + bi. What is the value of a+b?
asked by Shin 
Math (Algebra)
If a is a real number and a cubic equation f(x) = x^3 − 8x^2 + (a+12)x − 2a has a repeated root, what is the sum of all the possible values of a?
asked by Shin 
chemistry
calculate the degree of polymerization of polystyrene with a molecular weight of 3.091e6 gm/mol
asked by himani. 
Math (Algebra)
For each degree 17 polynomial f with real coefficients, let sf be the number of real roots (counted with multiplicity). Let S be the set of all possible values of sf. What is S?
asked by Shin 
chemistry
what is the value of degree of polymerization of isotactic PB with a molecular weight of 3.091e5 g/mol
asked by himani. 
Math (Percentage)
The price of a hat is reduced by a% from its regular price, and then is raised by a% from the reduced price. If the resulting price is an 81% discount from the regular price, what is a?
asked by Shin 
Math (Percentage)
An upscale clothing boutique charges $300 for a brand name pair of jeans, which is 50% more than the amount it costs the store to buy one pair of these jeans. As a benefit of working there, employees can purchase the pair of jeans at 30% off the store's
asked by Shin 
maths
rhombus ABCD is similar to rhombus BFDE. The area of rhombus ABCD is 24,and angle BAD=60degreees.what is the area of rhombus BFDE?
asked by ramesh reddy 
Math (Trigonometry)
In triangle ABC, we have AB = 16, BC = 29 and CA = √1097. What is the integer that is closest to 100 sin∠ABC?
asked by Tom 
Math (Trigonometry)
θ is an acute angle such that tan(θ) = 12. What is the value of 5√5⋅(sinθ+cosθ)?
asked by Tom 
Math
How high is a pole if it casts a shadow 6 meters long when the sun is 30 degrees above the horizon?
asked by Louise 
geometry
Γ is a circle with radius 10 and center O. A and B are points on Γ such that the arc length ABˆ=13. What is the area of sector AOB?
asked by girija prasad lenka 
Calculus
A piece of wire 40 m long is cut into two pieces. One piece is bent into a square and the other is bent into an equilateral triangle. How should the wire be cut so that the total area enclosed is a maximum= minimum= Find the length of the wire used
asked by Brian 
life orientation
environmental or human factor that cause ill health
asked by Anonymous 
dynamics
Mass of 2.3 kg and 4.5 kg is connected with the cord as shown. The coefficient of kinetic friction between box and floor is 0.35. Determine: a)The tension in the cord b)The acceleration of the blocks c)If the block start slides with 2.3 m/s, d)How far does
asked by ruby 
Economics
got this from my teacher, A monopolist faces a demand curve given by the following equation: P = $500 − 10Q, where Q equals quantity sold per day. Its marginal cost curve is MC = $100 per day. Assume that the firm faces no fixed cost. and have the
asked by Julie 
Pre Calc
Alice throws a ball straight up with an initial speed of 40 feet per second from a height of 5 feet? a) Find parametric equations that model the motion of the ball as a function of time. b) How long is the ball in the air? c) When is the ball at its
asked by Rebekah 
Pre Calc
A plane (A) heading south at 120 mph and a plane (B) heading west at 600 mph are rlying tword the same point at the same altitude. Plane A is 100 miles from the point where the flight patterns intersect and plane B is 550 miles from there. A) Find the
asked by Rebekah 
geometry
find acute angles A and B satisfying cot(A+B)=1 , cosec(AB)=2
asked by ajit yadav 
Physics
A mechanic pushes a 2.60 103kg car from rest to a speed of v, doing 5,000 J of work in the process. During this time, the car moves 21.0 m. Neglecting friction between car and road, find each of the following. (a) the speed v? (b) the horizontal force
asked by Abdalla A. 
chemistry
How many moles of sodium nitrate are in 0.65L of a 0.2 M NaNO solution?
asked by Alex 
Physics
A horizontal force of 150 N is used to push a 32.5kg packing crate a distance of 4.95 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following. (a) the work done by the 150N force? (b) the coefficient of kinetic
asked by Abdalla A. 
Physics
A 69kg base runner begins his slide into second base when he is moving at a speed of 3.7 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical
asked by Abdalla A. 
Physics
A rowboat crosses a river with a velocity of 3.37 mi/h at an angle 62.5° north of west relative to the water. The river is 0.590 mi wide and carries an eastward current of 1.25 mi/h. How far upstream is the boat when it reaches the opposite shore?
asked by Abdalla A. 
Physics
In a control system, an accelerometer consists of a 5.15g object sliding on a calibrated horizontal rail. A lowmass spring attaches the object to a flange at one end of the rail. Grease on the rail makes static friction negligible, but rapidly damps out
asked by Abdalla A. 
ecology
I have to write an essay about the northern spotted owl habitat, and I have to find at least 3 outside sources, I cannot copy word from word or anything, just paraphrasing and quoting I need some tips on how to put it together and how to start it from
asked by latisha 
Math
Maximize P= 8x1+12x2 Subject to 2x1+4x2
asked by SHelley 
Math
A ship travels NE (45 degrees) at 18 knots with a current of 8 knots direction North. What is the bearing of the ship and speed in knots?
asked by Elizabeth McKay 
gramman
Why does this pie have less or fewer peaches than the others. Grandmother took my brother and I or me to buy candles
asked by eileen 
trig
If a flywheel 8 ft. in diameter rotates at 80 rpm., what is the linear velocity of a point on the outside edge, in feet per minute in terms of pi?
asked by Garrett 
Algebra
what is the product of 2x and (x2 + 7x 8.
asked by Gabriella 
12th grade goverment
who could vote in elections for colonial legislatures
asked by lindsey 
Algebra 1
Emily rows six miles downstream in 1 hour and her friend Ashley,rowing 1 mile per hour faster,completes the return trip in 2 hours. 1.Find the speed of the current(c) and each girls rowing speed. 2.If Emily and Ashley were rowing separately,who would
asked by Jane 
Stats help
What does the best estimate mean after doing the liner regression equation
asked by Anonymous 
SCIENCE
IF SOMEONE WHEIGHS 12 KG ON THE MOON SO HOW MUCH HE WILL WEIGH ON THE EARTH
asked by armaan 
stoichiometry
what is the mole ratio of oxygen to water
asked by jojo 
Physic
A steel bar of length L=2 m, with modulus E=200 GPa and constant cross sectional area A=200 mm2 is constrained between two walls at its two ends A and B. A distributed axial load, fx(x)=−p0(1−3x2L), with p0=200 kN/m, is applied to the bar only in the
asked by Time 
Science
1. What is molarity of products? I can't decide if it's a. The concentration of the reactants measured in mol/L of solution or b. The concentration of the products measured in mol/L of solution 4. How does pressure relate to reaction rates? I'm stuck
asked by mysterychicken 
Science
If A tank with a flat bottom is filled with water to a height of four meters. what is the pressure at any point at the bottom of the tank? my teacher wants me to ignore atmospheric pressure when calculating my answer A. 3.5 kPa B. 3,500 kPa C. 34.3 kPa D.
asked by Caitlin 
math
Which two rectangles have an area of 72 square centimeters? A. length 12 cm, width 6 cm B. length 20 cm, width 16 cm C. length 9 cm, width 8 cm D. length 8 cm, width 7 cm
asked by ellie 
chemistry
The density of CO2 (g) at 25°C and 715 torr is:
asked by Anonymous 
algebra
the vertices of quadrilateral EFGH are E(7,3) F (4,6) G (5,3) and H (2,6) what kind of quadrilateral is EFGH
asked by jan 
Physic
The composite bar BCD in the figure is composed of an inner aluminum cylindrical core of length 2L=2 m and radius R=1 cm, and a sleeve of steel of length L=1 m and thickness R=1 cm surrounding the aluminum core in the CD section of the bar. The bar is
asked by Me 
Chemistry
What is the equilibrium constant for the reaction: Si + O2 SiO2 ? Is the answer just [SiO2]/[Si][O2] ?
asked by Anonymous 
Physics
Which causes an object in motion to stay in motion? A) friction b) gravity C) inertia D) velocity Its not friction..
asked by Kate 
Physics
1 you push a coin across a tabble, the coin stops. How does this motion relate to balanced and unbalanced forces?
asked by Kate 
College Chemistry 104
A voltaic cell consists of a Pb/Pb2+ halfcell and a Cu/Cu2+ halfcell at 25 C. The initial concentrations of Pb+2 and Cu+2 are 0.0500 M and 1.50 M, respectively. A. What is the initial cell potential? B. What is the cell potential when the concentration
asked by Samm 
Chemistry
A voltaic cell consists of a Pb/Pb2+ halfcell and a Cu/Cu2+ halfcell at 25 C. The initial concentrations of Pb+2 and Cu+2 are 0.0500 M and 1.50 M, respectively. A. What is the initial cell potential? B. What is the cell potential when the concentration
asked by Samm 
geography
what is granular disintergration?
asked by aross 
Manufacturing process
Product that using manufacturing process and its process.
asked by ruby 
propability!!!
A certain professional soccer team runs a 442 formation on the field. This means they play with 4 defenders, 4 midfielders, 2 forwards, and 1 goalkeeper on the field. If the team has 6 defenders, 5 midfielders, 3 forwards, and 2 goalkeepers, how many
asked by amgad ahmed 
Statistics
If x is a binomial variable with p = .4 and n = 25, write the probability that you would be looking for after you have applied the continuity correction factor for the following conditions for x: 3) x = 5 4) x > 5 5) x ≤ 5
asked by Anonymous 
Chemistry
A substance releases 496kJ of heat as 2.60 moles condense from a gas into a liquid. What is the molar heat of vaporization of the substance?
asked by Anonymous 
geometry!!!! PLEASE HELP!!!!
A,B,C,D,E,F are 6 consecutive points on the circumference of a circle such that AB=BC=CD=10,DE=EF=FA=22. If the radius of the circle is √n, what is the value of n? Details and assumptions: The lengths given are side lengths, not arcs.
asked by fudgee 
Life Orientation
Critically discuss 10 ways in which the environmental health hazard can impact negatively on one's health
asked by Kelebogile 
math
kyle gave 1/4 cookies to her brother, gave 23 cookies to her friend. He gave 2/10 of remaining cookies to his mother. Then took 5/8 to school to share. how many cookies did Kyle have left
asked by kalle 
geometry!!! please help me!!!!
ABC is a triangle with ∠ACB=45∘. D is a point on AC such that AD=2DC. If ∠ADB=60∘, what is the measure (in degrees) of ∠CAB?
asked by glo 
Science
Please check my answers (at the bottom) with these questions. 1. An apple quickly changes color when exposed to air. This demonstrates a ________. (1 point) physical property chemical property physical change all of the above 2. When a chunk of dry ice is
asked by Annabelle Hartz 
algebra!!!! please help me!!!!
Suppose θ is an angle strictly between 0 and π/2 such that sin5θ=(sin^5)θ. The number tan2θ can be uniquely written as a√b, where a and b are positive integers, and b is not divisible by the square of a prime. What is the value of a+b?
asked by flex 
math
Brenda earns $14,260 per year. paid 24 times a year with 1 exemption. If $19.63 in taxes is withheld from each check at what rate is she taxed
asked by carol 
accounting
A company was recently formed with $ 50,000 cash contributed to the company by stockholders. The company then borrowed $ 20,000 from a bank and bought $ 10,000 of supplies on account. The company also purchased $ 50,000 of equipment by paying $ 20,000 in
asked by dan 
Science
These are some more questions, they're not multiple answers they're S.A so the questions will be first and my answers will be on the bottom. 17. Describe the difference between thermal energy and temperature. Use the following words to help structure your
asked by Annabelle Hartz 
Life orientation
Discuss 5 ways in which the human or énvironmental problem impacts.
asked by Amanda amy roux 
life orientation
environmental problems impact on the community
asked by environmental problem impacts on the community 
geometry
find acute angie A and B satisfying cot(A+B)=1 , cosec(AB)
asked by ajit yadav 
Chemistry
One chirality of CH3CHCICOOH is shown below. COOH  C H3C/ \CI    H Identify the image(s) below that excibit the opposite chirality. Select all that apply. (a) COOH (b) H   C C _  _ / \ _  _ H3C CI _  _ _ _  _ _ CI  CH3 _ H COOH (c) CI (d) COOH 
asked by Anonymous 
CHEM
IF A 50.0 ML SAMPLE OF CALCIUM HYDROXIDE IS TITRATED WITH 25.0 ML OF 0.200M PHOSPHORIC ACID, WHAT IS THE MOLARITY OF THE BASE?
asked by SHANNA 
Algebra 2
A culture started with 2,000 bacteria. After 6 hours, it grew to 2,200 bacteria. Predict how many bacteria will be present after 12 hours. Round to the nearest whole number.
asked by Kevin 
Chemistry
Estimate how many microwave photons with 1=12 cm must be absorbed to raise the temperature of your eye by 3 degree C. Assume the mass of an eye is 11 g and its specific heat capacity is 4.0 J/g/k
asked by Sarah 
life orientation
what five ways that have an impacts on our ommunities
asked by samkelo 
Chemistry
An unknown solid acid is either citric acid or tartaric acid. To determine which acid you have, you titrate a sample of the solid with NaOH. The appropriate reactions are as follows: Citric acid: H3C6H5O7 (aq) + 3NaOH (aq) > 3H2O (l) + Na3C6H5O7 (aq)
asked by Sarah 
Chemistry
Which two elements is the second transition series (y through Cd) have four unpaired electrons in their 3+ ions?
asked by Sarah 
Algebra 2
A 14 gram sample of a substance that's used to preserve fruit and vegetables has a kvalue of 0.1092. Find the substance's halflife, in days. Round your answer to the nearest tenth.
asked by Tristan 
ENGLISH
6. The most common rule for forming plural nouns is A. adding es to the word. B. changing the y to i and adding es. C. dropping the last letter and adding ies. D. adding s to the word.
asked by NANA 
ENGLISH
7. In which of the following sentences is the underlined verb in the future perfect tense? A. They will take the dog to the park with them. B. She really should begin to pack. C. Jean's daughter has begun to drive. D. By that time, he will have been gone
asked by NANA 
Math
What is the barbell method
asked by David 
URGENT~MATH For Steve or Reiny
For questions 57, find the solution to the system of equations by using either graphing or substitution. 5)y=6x and y=x2 (1point) (2,4) (4,2) (4,2) no solutions 6)y=2x1 and y=x+3 (1point) (4,7) (7,4) (7,4) no solutions 7) y=4x and y+x=5 (1point)
asked by Gabby 
Chemistry
Explain, not just describe, the relationship between these rankings. Most reactive to least reactive metals: Zn, Pb, Cu, Ag Most reactive to least reactive metal cations: Ag, Cu, Pb, Zn
asked by Jaden 
Life orentation
Describe the life style disease/behaviour and explain 5(or more) factor that contribute to the disease
asked by Kamogelo 
chem
how much heat is emitted when 65.6 g of isopropyl alcohol condenses at 25 degrees C
asked by Anonymous 
math
Joey has a beach ball with a radius of 20 cm. What volume of air will it hold when fully inflated?
asked by Nadia 
math
1. Calculate the interest charge on a $5,000 balance with your current 16.5% annual interest rate. 2. Calculate the interest charge on a $5,000 balance with the Visa Student Card’s annual interest rate of 10.8%.
asked by Mary 
life orientation
in 1015 lines critically discuss 5 ways in which the human or enviromental problem impact on the community
asked by shalati 
English II
Use the text box below to do a fiveminute freewriting session. Time yourself. If you would like to try again, give yourself another five minutes. Remember, this is freewriting. You may type whatever you like. This section of your submission will not be
asked by Carlos 
Life orentation
Describe the life style disease/behaviour and explain 5(or more) factor that contribute to the disease of hiv and aids
asked by Kamogelo 
American History
Most of the asians who immigrated to the united states in the 1850s came because a.) Of available work b.) Of the rumor of a "golden mountain" in california" c.) they were forceds to flee due to collapes of the japanese economy d.) none of these
asked by Mac 
IITJEE
i have to prepare for my IITJEE examination. But i have no knowledge about the books for preparation. Please tell me some books for the preparation of objectives for IITJEE. Now i am in 10+2 class.
asked by jacob 
Psychology
Personality disorders are thought to originate during childhood but many health professionals are reluctant to diagnose children. Why is this? I need to know the positives and negatives of early diagnosis of personality disorders in children. Can someone
asked by Kelly 
statistics
Assume that body temperatures of healthy adults are normally distributed with a mean of 98.2°F and a standard deviation of 0.62°F. Find the 90th percentile of the sample mean body temperatures for samples of size 16.
asked by ali awan 
Math
This box plot shows the heights in inches of girls on a freshman basketball team. What would you say is a typical height of a team member? I can't show the box plot on here, but I would like to know what a "typical height" is. Like is this asking for an
asked by Cassidy 
chemistry
a stone is thrown vertically upwards from the edge of a tower with velocity 5m/s.it strikes the ground close to the base after 4s .the height of tower?
asked by aswini 
chemistry
If the endpoint in the titration of KHC8H4O4 solution with the NaOH solution is mistakenly surpassed, will the molar concentration of NaOH solution be reported too high or too low?
asked by Kerapetsi 
arithmetic
james used the rule add 2 to create a sequence.the he used the rule add 12 to create a second sequence.what are the first five terms in each sequence james created?
asked by katherine 
Math
The area of a hexagon is 42 square cm. If all the dimesions of the hexagon are multiplied by 3, what will be the area of the new figure? a) 126 cm2 b) 252 cm2, c) 378 cm 2 d) 14 cm2 I took 42 cm x 3 and got 126 cm2 did I work this correctly?
asked by Daniel 
Physics Plz help me
If a galaxy is traveling away from us at 2.0% of the speed of light, roughly how far away is it? t= light years I got 2.4x10^8 light years but its wrong please help me out...thank you Physics Plz help me  Anon, Monday, May 6, 2013 at 9:17pm 5.98x10^6
asked by Leila 
statistics
A certain professional soccer team runs a 442 formation on the field. This means they play with 4 defenders, 4 midfielders, 2 forwards, and 1 goalkeeper on the field. If the team has 6 defenders, 5 midfielders, 3 forwards, and 2 goalkeepers, how many
asked by amgad ahmed 
statistics
According to the Census Bureau's 2002 American Community Survey, the average travel time to work of workers 16 years and over living in Boston, MA, who did not work at home, was 28.2 minutes with a standard deviation of 0.79 minutes. A sample of 35 commute
asked by ali awan 
statistics
Participants from the National Health and Nutrition Examination Survey, 2003–2004, had a mean BMI of 28.3 with a standard deviation of 6.0. Assuming BMI is normally distributed, what proportion of the participants had a BMI measure over 35?
asked by ali awan 
statistics
Find the value of Z that is smaller than 90% of all values of Z.
asked by ali awan 
Math
Find the sum of the G.p.2+6+18+54+...+1458
asked by Haleemath 
trig
find the minimum and maximum value of sin100 degree plus cos100 degree
asked by ria 
Math
Solve the equation simultaneously.1/3x+y =3,x+1/2y=4
asked by Haleemath 
calculus
If the unicorn seat on a merrygoround is 5 feet from the center, and the merrygoround completes a full rotation in 6 seconds, how many feet does the unicorn travel in one second?
asked by chely 
Hospitality
A key difference between Social and Corporate event planner work is the days of the week that are usually worked. True or False
asked by Jake 
Hospitality
A key benefit identified as being part of the Food Service industry that Compass is not having to work nights and weekends regulary. True of False. I say True, becaue when you don't work during nights at food industries?? what do you think
asked by Jake 
physics
Two trains are moving in opposite diections on parallel tracks and are appoaching a station. Horns on both trains are producing sound of frequency of 500Hz. One train is approaching at 32m/sec. What is the speed of the other train if an observer at the
asked by reddy22 
Statistics
You have a ten question multiple choice test in your next class and you did not study at all. Each question has four choices and only one correct answer. You are going to guess on each question. What is the probability that you score at least a 20% on the
asked by Liz 
Life orientation
Name two institutions that involved in supporting or giving redress to homelessness .
asked by Thembelihle 
math
A shop sells onepound bags of peanuts for $2 and threepound bags of peanuts for $5. If 9 bags are purchased for a total cost of $36, how many threepound bags were purchased?
asked by ja'Sae 
Hospitality
According to the Farm to Table speaker's, local Farmer's Market's are a key source of produce and other food products for them weekly True False I say, true because food is what farmers produce?
asked by Jake 
Units of Volume and Capacity
Greater than, less than, equal to: 30 mL ___ 30cm cubed 100cm cubed ___ 1 gallon Please explain.
asked by Celest 
consumer math
The amount that results when $2,000 is compounded at 8% annually over six years
asked by Anonymous 
Math
Using logarithm table,solve,0.016*0.084/0.48
asked by Haleemath 
math
A round tank hold 550 gallons filled to the brim. Its capacity is 10 gallons for every inch in height. How high is the tank in inches, in feet. How high would you fill it get to the 170 gallon level?
asked by Jerome 
algebra
A coffee shop sells small cups of coffee and large cups of coffee. A small cup of coffee costs $2. A large cup of coffee costs $3. On Tuesday, the store sold a total of 155 cups of coffee for a total of $335. How many small cups of coffee did the store
asked by anna 
the fallacies of generalizing PLEASE HELP!
A quasiscientific study was done to find some link to autism. In the study, it was found that children who had an autistic tendency were delivered after an average of about 30 hour labor. They all weighed an average of 10 pounds. The study was done in a
asked by Steve 
Math
Joseph is going to see his favorite sports team play and wants to show his team spirit. He has 4 different jerseys and 6 different hats depicting his team. How many different combinations of jerseys and hats does he have to choose from?
asked by bubbie 
Spanish 2
All the verbs that have not been conjugated need to be either in preterite or imperfect form. My spanish teacher hasn't really explained it that well and I am confused on how to know whether its imperfect or preterite.Now we have a test on it tomorrow. Can
asked by Jessica 
Technology Skills class???? Grade 9???
So I got accept to this Catholic private high school. So we are required to take "Technology Skills". What am I going to learn in this class??????
asked by Laruen 
Multiplying Decimals
14.83x16.7
asked by Jerald 
Interest
It’s time to go shopping! You grab your Best Purchase credit card, which has an annual interest rate of 18%. The unpaid balance on your card for the current billing cycle is $285.76. On your shopping trip, you purchase four items: a Bluray player, two
asked by Mary 
Chemistry
The voltage generated by the zinc concentration cell described by, Zn(s)Zn2 (aq, 0.100 M)Zn2 (aq, ? M)Zn(s) is 23.0 mV at 25°C. Calculate the concentration of the Zn2 (aq) ion at the cathode. Can someone please breakdown how to do this so I can figure
asked by Chris 
Math
Is 72.98 = 72.980 my answer is true.. Is it correct?
asked by Mike 
Math
11.04x6.18 I know at first I get 8832. Then I drop a zero then get 11040 for my next answer Then Do I add 8832 and 11040 to get my answer?
asked by Jerald 
child care
A study in 2005 showed that 70% of parents felt that their children were too ______ school, family finances, and divorce.
asked by Nab 
Physics Help me Someone plz
If a galaxy is traveling away from us at 2.0% of the speed of light, roughly how far away is it? t= light years I got 2.4x10^8 light years but its wrong please help me out...thank you Physics Plz help me  Anon, Monday, May 6, 2013 at 9:17pm 5.98x10^6
asked by Leila 
Physics
The activity of a sample of 35(upper#) 16(lower#)Sulfer (T 1/2= 7.55x10^6 s) is 2.51x10^5 decays per second. WHat is the mass of the sample? m= in grams PLease help me out...Thank you! :)
asked by Leila 
Math
1. 7x2x2.1=15.12 2. 4.3x8.5=36.55 3. 2.64x1.4=3.696 4. 14.23x8.21=116.8283 5. 5.01x11.6=58.116 6. 9.001x4.2 37.8042
asked by Jerald 
PHYSICS
In the lungs there are tiny sacs of air, which are called alveoli. An oxygen molecule (mass = 5.30 × 1026 kg) is trapped within a sac, and the uncertainty in its position is 0.120 mm. What is the minimum uncertainty in the velocity of this oxygen
asked by Ashley 
PHYSICS
Two parallel slits are illuminated by light composed of two wavelengths. One wavelength is λA = 553nm. The other wavelength is λB and is unknown. On a viewing screen, the light with wavelength λA = 553nm produces its thirdorder bright fringe at the
asked by Ashley 
physics
Two stars are 2.4 × 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.72 m and just detects these stars as separate objects. Assume that light of wavelength 590 nm is being observed. Also, assume
asked by Ashley 
AP CALCULUS
I have my test tomorrow. I am very weak at free response. What kind of question they ask in free response?
asked by nitali 
mathematics
Write the equation of the line satisfying the given conditions. Passing through ( 9, 7 ) with slope  3
asked by Anonymous 
mathematics
Write the equation of the line satisfying the given conditions. Passing through ( 5, 4 ) whose slope is undefined
asked by Anonymous 
Math
1. 0.3x0.5=0.15 2. 1.2x2.1=2.52 3. 2.5x6.7=16.75 4. 0.4x8.3=3.32 5. 2.3x1.21=2.783 6. 0.6x0.91= 0.546 7. 6.5x 0.04=0.260 8. 8.54x3.27=27.9258
asked by Jerald 
Algebra
What is the simplified form of (2a2b)2 (3ab3c)/4a4b8c2
asked by Keondre 
physics!
Late one night on a highway, a car speeds by you and fades into the distance. Under these conditions the pupils of your eyes have diameters of about 7.0 mm. The taillights of this car are separated by a distance of 1.2 m and emit red light (wavelength =
asked by Ashley 
Math help please
2. –3m(m + 8) –3m^2 + 24 –3m^2 – 24m –24m^2 –4m + 5 4. (3x + 4)(x – 2) 3x^2 – 2x – 8 x – 8 3x – 2x – 8 3x^2 + 2x + 8 5. (2y – 1)(4y – 3) –2y + 3 8y^2 – 10y – 3 8y^2 – 10y + 3 8y^2 – 2y + 3 My answers: 2. –3m^2 –
asked by Delilah 
Physics help!
On a hot summer day, the temperature of air in Arizona reaches 118°F. What is the speed of sound in air at this temperature? (Enter your answer to four significant figures. The speed of sound at 0°C is 331 m/s. Use the conversion 0°C = 273 K as
asked by Abdul A. 
hyperbolas
Find the equation of the hyperbola that has a center at (8,1), a focus at (3,1), and a vertex at (4,1).
asked by dylan 
Physics help!
The range of human hearing extends from approximately 20 Hz to 20,000 Hz. Find the wavelengths of these extremes at a temperature of 2°C. 20 Hz? 20000 Hz?
asked by Abdul A. 
Physics help!
There is evidence that elephants communicate via infrasound, generating rumbling vocalizations as low as 14 Hz that can travel up to 10 km. The intensity level of these sounds can reach 105 dB, measured a distance of 4.5 m from the source. Determine the
asked by Abdul A. 
hyperbolas
Find an equation for the hyperbola whose graph has vertices (+/5,0) and foci (+/7,0)
asked by dylan 
Chemistry
A gas occupying a volume of 664 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?
asked by Logan 
algebra
a number cube is rolled 2 times in a row. what is the probability of rolling a number greater than 2 both times?
asked by anon 
Math
Can the sum of two mixed numbers be equal to 2. Also what does 21. 11/12 plus 17. 5/12.
asked by Gurleen Kaur 
Math
What two mixed numbers have the sum 3?
asked by Anonymous 
Algebra
Square root 18 + 3/square root 2
asked by Brittany 
Sports: Football
Please help me understand football. Basically, isn't it just tackling, passing, and touchdown?
asked by Celest 
physics
A wire is made of a material with a resistivity of 4.85109 × 10−8 Ω · m . It has length 5.57436 m and diameter 0.36396 mm . What is the resistance of the wire? Answer in units of Ω
asked by Anonymous 
Math
A ladder is in a safe position if the height it reaches on the wall is four times the distance of the base from the wall. To the nearest tenth of a foot, find the length of the following ladder. The ladder must reach a 16foot height.
asked by Cass 
Math
The surface area of a cylinder is about 218 in^2. What is the surface area of a smaller cylinder that is smaller by a scale factor of 1/2?
asked by Hunter 
Calculus 1
A car comes to a stop six seconds after the driver applies the brakes. While the brakes are on, the following velocities are recorded: Time since brakes applied (sec) 0 2 4 6 Velocity (ft/sec) 83 40 11 0 Give lower and upper estimates for the distance the
asked by Dolores Ramirez 
Calculus 1
The velocity v(t) in the table is increasing,0
asked by Dolores Ramirez 
physics
An object is moving along a straight line, and the uncertainty in its position is 2.40 m. (a) Find the minimum uncertainty in the momentum of the object. Find the minimum uncertainty in the object's velocity, assuming that the object is (b) a golf ball
asked by Ashley 
Math
Evaluate each expression if x=5.07 y=1.5 and z= 0.403 7.3.2x+y 16.224
asked by Jerald 
math
One of your dresser drawers contains 10 black socks and 10 blue socks. Suppose it is dark and you can’t tell what color a sock is when you look at it. If you start taking socks randomly one at a time from the drawer, how many would you have to take to
asked by Anonymous 
Math
You estimate there is an 80% chance you will get an A on your math final, and a 75% chance you will get an A for your semester grade. What is the probability that both will happen?
asked by ValeeRo 
Science help please, thanks!
Can you maybe give me two examples for actionreaction forces? I'm curious. Thanks!
asked by Gabby 
physics HELP!!
An object is moving along a straight line, and the uncertainty in its position is 2.40 m. (a) Find the minimum uncertainty in the momentum of the object. Find the minimum uncertainty in the object's velocity, assuming that the object is (b) a golf ball
asked by Ashley 
Phase Changes
The heat of vaporization of water is 2.26 kJ/g. How much heat is needed to change 3.74 g of water to steam?
asked by Jenny 
Math/Probability
How do I calcuate probability word problems
asked by Nikki 
Math
find the equations of the three perpendicular bisectors of the sides of triangle qrs.
asked by J.J 
calc
If an open box has a square base and a volume of 91 in.3 and is constructed from a tin sheet, find the dimensions of the box, assuming a minimum amount of material is used in its construction.
asked by Anonymous 
writing
how do you write a coclusion
asked by joann 
Chemistry
A gas occupying a volume of 664 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?
asked by Logan 
Math
At the Statsville County Fair, the probability of winning a prize in the basketball toss game is 0.1. a) Show the probability distribution for the number of prizes won in 8 games (round to 6 decimal places). b) If the game will be played 500 times during
asked by Lily 
Chemistry
An antacid tablet containing magnesium hydroxide instead of calcium carbonate was dissolved in 100.0 mL of 0.2893 M HCL. 10 mL of this solutions was titrated to endpoint with 25.20 mL of 0.1007 M NaOH. How much magnesium hydroxide was in the antacid
asked by Mindy 
Probability Math
A committee of four students will be selected from a list that contains six Grade 9 students and eight Grade 10 students. What is the expected number of Grade 10 students on the committee?
asked by Lily 
Math
Evaluate each expression if x= 5.07 y=1.5 and z=0.403 7. 3.2x+y 16.224 8.yz+x 5.6745
asked by Jerald 
Science
100 ml of water at 20 degrees celcius has more,less, or the same thermal energy than 500 ml of water at 20 degrees?
asked by Abby 
History
The city of Philadelphia is located near which lines of latitude and longitude?
asked by Ellisyn 
Physics Need help please
An ancient wooden club is found that contains 270g of carbon and has an activity of 8.3 decays per second. Determine its age assuming that in living trees the ratio of 14C/12C atoms is about 1.3x10^12? t= in years
asked by Leila 
Physics
Estimate the total binding energy for copper. 550 MeV Estimate the energy, in joules, needed to break a 3.0g copper penny into its constituent nucleons. E= in Joules Please help me out I got 1st part I need the Energy in joules am confused please help me
asked by Leila 
Math
Evaluate each expression if x= 2.1 y =0.031 and z = 3.05 22. xy+z 3.1151 23. y+xz 6.436 24. x X 13.55 i y 27.424
asked by Jerald 
Bookkeeping
Do you have the answers for the exams under bookkeeping course in pennfoster?
asked by Chrisitna 
English
write sentences using these words: prejudice apartheid thanks :)
asked by Ryle 
Algebra
Find the coordinates of the vertex and determine whether the graph opens up or down. y=x^2+x5
asked by Sabrina 
math
find derivative of f(x)= log_5((x4)^3) + e^((x1)(x+1)) Log_5 means log base 5
asked by Steve 
2
from 962 which eves number has 6 tens
asked by maria 
chemistry
A sample of an ideal gas has a volume of 2.29 L at 2.90 × 102 K and 1.08 atm. Calculate the pressure when the volume is 1.57 L and the temperature is 302 K.
asked by Alexis 
math
Ok, so when you are solving an equation, and you have an answer such as 5x=0 , does that mean that it is no solution or all real #s? And, when the answer is 4=4 , does that mean it is no solution or all real #s? And when the answer is 2x=2x, does that mean
asked by K 
English
k so i tried making one: Sarah had a prejudice against doctors. I think this sentence is too simple, how can i make it better?
asked by Ryle 
Algebra
It is 74.4 miles from Dwane and Patti's house to Martha's house. Patti leaves home at 10:00 and drives toward Martha's house. Dwane and Martha set off half an hour later from their own houses and drive toward the other's house. The average speed of the
asked by Need help fast 
geometry
How to get answer for c=2 pie r 4 yards
asked by shardae 
Math (Percentage)
The price of a hat is reduced by a% from its regular price, and then is raised by a% from the reduced price. If the resulting price is an 81% discount from the regular price, what is a?
asked by Tom 
ochem
Consider a sample that is a mixture composed of biphenyl, benzoic acid, and benzyl alcohol. Predict the order of elution of the components in this mixture on the TLC plate when solvent system a, b or c is used. a)Cyclohexane: Methylenechloride:100%:0%
asked by bez 
Math
2500 students take a college entrance exam. The scores on the exam have an approximate normal distribution with mean u = 52 points and a standard deviation o = 11 points. Estimate the percentage of students scoring 52 points or more. ^ How would you do
asked by Ruth 
Chemistry
Explain why iron corrodes more quickly in seawater than in freshwater. I'm getting conflicting answers from searching on Google; is it because the corrosion of iron is a redox reaction, which involves a transfer of electrons, and therefore this transfer of
asked by a Canadian 
Math (Probability)
Four players are playing a game involving choosing positions on a grid of size 3×8. Each player chooses a random position on the grid, then all players reveal their choices and a token is placed on each of the positions. The probability that the tokens
asked by Tom 
math
make a line plot for each set of data. Identify any clusters, gaps and outliers. daily low temperatures 26F, 25F, 24F, 29F, 28F, 21F, 10F number of stories in town buildings 3, 3, 1, 1, 8, 6, 6, 4, 3, 23, 7, 9
asked by eileen 
ochem
Give the reaction products of sodium borohydride (followed by water addition at the end of the reaction) with the following compounds: a) Acetone b) mnitroacetophenone c) 3buten2one
asked by ang 
Math!
Solve the equation on the interval 0
asked by Hannah 
Math story problem
A satellite dish is shaped like a paraboloid of revolution. the signals that emanate from a satellite strike the surface of the dish and are reflected to a single point, where the receiver is located. If the dish is 14ft across at its opening and 4ft deep
asked by Hannah 
Math
give a onesentence definition fora polynomial equation
asked by Jenny