Questions Asked on
June 16, 2015

Chemistry
Equilibrium constants at 25 ∘C are Substance Kc Value of Kc CaCO3 Ksp 4.5×10−9 H2CO3 Ka1 4.3×10−7 Ka2 5.6×10−11 What is the molar solubility of marble (i.e., [Ca2+] in a saturated solution) in acid rainwater, for which pH=4.20?
asked by Samantha 
Algebra
in what form is the following linear equation written? 3x2y=4 A.riserun B.standard C.slopeintercept D.pointslope
asked by karla 
maths
A can is 12cm high and diameter 8cm. Using the formula v =TT how much liquid is in the can
asked by sue 
mathematics
Lily Adams purchased a $1,000 bond at 70. The bond pays 4% What was the cost of the bond? What was the annual interest? What is the yield (to the nearest tenth of a percent)? (please only post of you know answer or at least will tell me how to get the
asked by Anonymous 
mathematics
Find I. Choose the correct answer. Amount Financed (m) = $1,400 Number of Payments per year (y) = 12 Number of Payments (n) = 24 Total Interest (c) = $200.50
asked by Anonymous 
mathematics
Jane Investor purchased a $10,000 bond at 90. The annual interest is 5%. What was the cost of the bond? What was the annual interest? What is the yield (to the nearest tenth of a percent)?
asked by Anonymous 
Spanish
11. Wake up early! A. ¡Acuéstate temprano! B. ¡Despiértese temprano! C. ¡Tú te despiertas temprano! D. ¡Me despierto temprano! E. unable to answer Answer: B 12. Cuando Luís montaba a caballo, siempre _____________ al suelo. A. caiga B. cayó C. se
asked by Anonymous 
Algebra
For what real number k does the product (25 + ki)*(3+2i) equal a real number?
asked by XXX 
Chemistry
What is the pH change of a 0.220M solution of citric acid (pKa=4.77) if citrate is added to a concentration of 0.155M with no change in volume?
asked by Samantha 
Chemistry
Item 1 Maleic acid is a carbonhydrogenoxygen compound used in dyeing and finishing fabrics and as a preservative of oils and fats. •In a combustion analysis, a 1.054g sample of maleic acid yields 1.599 g of CO2 and 0.327 g of H2O. •When 0.609 g of
asked by Samantha 
analytical chemistry
a 0.4617g sample containing sodium bicarbonate was dissolved and titrated with standard 0.106M of hydrochloric acid solution , requiring 40.72ml. the reaction is: HCO3 + H+ > H2O + CO2 Calculate the percent sodium bicarbonate in the sample. (Given
asked by zzz 
math
Bob does 2/7 of a book in 1 hour.how long will he take to do the remaining work?
asked by Ahmed 
Chemistry
Calculate the mass percent of a NaCl solution in which 158g of NaCl is dissolved in 3.81L of water at 25 ∘C (density = 0.997 g/mL).
asked by Alicia Estrada 
chemistry
The concentration of Mg2+ ion in a solution is 0.010M. At what pH will Mg(OH)2 first precipitate? (Given Ksp Mg(OH)2 equals 1.2*1011)
asked by Lisa 
trig
Help with simplest form sin(2pift  pi) + sin(2pift + pi)
asked by sheree 
Chemistry
Predict the products of the electrolysis of a solution of aqueous MnSO4 given the following choices: a. H2SO3 (aq) b. O2 (g) c. H2 (g) d. OH (aq) e. Mn (s) f. e g. H+ (aq) how is the answer O2 and H2SO3?
asked by Sara 
chemistry
A lactic acid/lactate ion buffer solution contains 0.43M HC3H5O3 and 0.90M C3H5O3. The value of lactic acid is 1.4*104 calculate the pH of this buffer
asked by jennifer 
chemistry
What volume of 0.076M HNO3 is required to titrate 20.0ML of 0.25M Ba(OH)2 solution? use 2 sig figures
asked by jennifer 
physical science
An input force of 20 newtons is applied to a lever at a distance of 2 meters from the fulcrum. An object 0.5 m away from the fulcrum (and on the other side) is lifted by the 20N force. What is the output force? A. 10 N B. 20 N C. 40 N D. 80 N
asked by tetianna 
Math
there is a swimming pool, 3 meters in width and 4 meters in length. the owner wants to built a uniform deck around the swimming pool which is 3 times of the area of the pool. what's the width of the deck?
asked by Eric 
trig
A radio transmission tower is 471.0 feet tall. A guy wire is to be attached 6 feet from the top and is to make an angle of 23.1 degrees with the ground? How many feet long should the guy wire be? I am confused on how to find the equation for this problem
asked by Coaco 
mathematics
Oaktree Transportation Corporation has 75,000 shares of stock outstanding. What would the dividend per share of stock be from a dividend declaration of $102,750? How many shares of stock does Jody Nichols hold if her share of the dividend is $20.55?
asked by Anonymous 
precalculus 11
The infinite series 1+3x +9x^2 +27x^3+.. has a sum of 4.The value of x is? so if 1/1r I substitute 1/13x =4 so x=1/4 if someone could confirm that my answer is correct? thanks so much
asked by george 
Algebra
What constant must we place in the blank below in order to be able to factor the resulting expression into the product of two linear factors: 2mn  16m  7n + ____
asked by XXX 
Chemistry
I have know clue how to answer this, but I tried something.(predicting products of electrolysis in aqueous solution)/ Predict the products of the electrolysis of a solution of aqueous MnSO4. I first wrote this: Mn^2+ SO4^2 Then for Mn^2+, it can be
asked by Sara 
Chemistry
Use each equation to predict whether the relative entropy change is S(products) > S(reactants) or S(products) < S(reactants) and whether Î”S > 0 or Î”S < 0 for the chemical reaction represented. Justify your answer in each case. a.
asked by Madison 
Physics
Three blocks of mass 10kg, 20kg, 15kg respectively are being pushed in a row on along a horizontal surface with constant velocity by a force applied to the 10kg block.The coefficient of kinetic friction between each of the blocks and the surface is 0.18.
asked by Alex 
physics
A small bead of mass 100 g is able to slide along a frictionless wire. The wire is bent into a semicircle of radius 10 cm and rotates about a vertical axis with angular velocity 12.5 rad/s. (i) Draw a free body diagram depicting the forces acting on the
asked by Khali Barkho 
ELA
t the library, the quickest way to locate varied, reliable information for your research paper is to A. check the encyclopedias. B. search the card catalog for related titles. C. ask the reference librarian. D. check the Readers' Guide.
asked by Brooklyn 
chemistr
What mass of HNO3 is needed to prepare 400mL of 0.25N solution?
asked by jennifer 
Chemistry.
Predict these reaction products. If a reaction takes place, balance the reaction if needed. If no reaction takes place then write no reaction. Cu+FeCl3>CuCl3 + Fe Double replacement Al+HBr> AgNO3 + KCL>AgClKnO3 Double replacement
asked by Jessy 
Economics
In a command economy, who issues "commands" regarding the three basic economic choices? Question 1 options: Business leaders Government Consumers All of the above
asked by Anonymous 
sgmic
Prove that tan theta+tan 2theta+tan 3theta=tan theta*tan 2theta*tan 3theta
asked by radhika pandey 
Carmel
A memory card is one quarter full when 375 more pictures are taken it'll be two thirds full how many pictures can the memory card hold and how many pictures are on it?
asked by Jon 
math
what is the volume of the cylinder to the nearest whole number? use 3.14 for pi r=4 h=10 my answer is 502.65 and rounding it is 503
asked by siulanis perez 
MATH
A 95% confidence interval for the mean of a normal population is found to be 17.6
asked by MARY 
precalculus 11
The question is the roundtrip flight from Edmonton to Toronto covers a distance of 5400km in 7.6 hours. The speed from Edmonton to Toronto was 95 km/h faster than the speed from Toronto to Edmonton. What was the speed of the plane from Toronto to Edmonton?
asked by george 
Chemistry
Consider the NiCd (nickle cadmium) cell found in rechargeable batteries. 1.)Which element is the cathode when the cell is recharging (being electrolytic)? 2.)How many cells must be present to produce 1.2 V 3.)Which element is the anode when the cell is
asked by Sara 
science
Time of evaporation of 250ml of water at room temperature
asked by sjdooa 
college chemistry
Calculate the molarity (M) of 156.2g of H2SO4 in 1.275L of solution.
asked by Alicia Estrada 
Math
At a community picnic, the following liquids were combined to make a punch: 3 gallons of water 1.5 gallons of cranberry juice 1 pint of strawberry juice 1 cup of grape juice 3 quarts of pomegranate juice How much punch was made in all for the community
asked by Anonymous 
Physics
A projectile of mass 0.636 kg is shot from a cannon, at height 6.6 m, as shown in the figure, with an initial velocity vi having a horizontal component of 6.8 m/s. The projectile rises to a maximum height of ∆y above the end of the cannon’s barrel and
asked by alex 
New lekhnath public academy.N.L.P.A
THE means of transportation that are inside the water and water surface both is called submerging.
asked by Rajesh Dahal 
Mantaqui
The amount of carbon which when completely burnt in air,produces 100gram of carbon dioxide by weight is
asked by Xaim 
Earth Science
What is the atmosphere's role in the exchange of gases on Earth?
asked by Victoria 
Electrolysis
A current of 1.2A was passed through an electrolytic cell containing dilute Tetraoxosulphate(VI) for 40minutes. Calculate the volume of gas produced at s.t.p.
asked by Micheal 
physics
identify tie force fields from the following : density field, temperatuse field, gravitational field, magnetic field, electrostatic field, electric field
asked by Anonymous 
algebra
find the quotient of 2x+1/4x^2+8x+5
asked by memo 
Spanish
I was hoping you could proofread this for me please? No tenía ningún problema en el mundo cuando era más joven. Viajaba por lo menos una vez al mes. Volaba de Nuevo México Y Arizona mucho. Soy originalmente de Arizona, pero la vivía mayoría de mi
asked by Anonymous 
ELA
You are least likely to feel that an Internet source is reliable if the information is posted A. on the U.S. Department of Labor Web site. B. on the Web site of your local police department. C. from a university department. D. without a
asked by Brooklyn 
Geometry
Solve for z. I got z=72 degrees and i don't know how I got it. The circle has diameter AB then another diameter CD. Arc AD = 40 degrees then angle DEB = 124 degrees and z = BC. The diameter DC intersects diameter AB. Please help i can't figure it out and
asked by Lexy 
english
In each sentence, there is one word which is incorrect. Choose the one word or phrase that is in? 1. What is the name of the taller mountain in the world? a. Is b. Name c. Taller d. In 2. Every morning, Kristen wake up at 7.00am on the dot a. Every b. Wake
asked by indra 
writing sentences and paragraph
Respected Sir/Madam, Myself Yogita Chadha Medical Healthcare Professional. I have Diploma in pharmacy and professional certificate in medical health care services. I have a handsome experience to serve in health care industry. I work almost one and half
asked by yogita 
algebra
three times a number decreased by 7 is equal to the number increased by 39. what is the number?
asked by chenny 
English
May I take your order?  Yes, please. I'll have a ham sandwich and an orange juice.  Is that all?  Yes. How much is it all together? =============================== Q1: In the short dialogue, will you look at the last sentence? What about the following
asked by rfvv 
physics
A person goes to market,makes purchases and comes back at a constant slower speed.Draw displacementtime and velocity time graphs of the person
asked by nikitha 
MATH
A theater puts on a play and it's overhead is $750. It will charge adult's $5 per ticket and students $3 per ticket. The theater holds 200 people. What is the maximum profit? (How many adult tickets will be sold and how many student tickets will be sold?)
asked by Anonymous 
Maths
A cylindrical tank has the dimensions a 100cm and 140cm ,if the tank is filled with 275 liters of water what is the depth of water in the tank
asked by Andre 
math
solve each of the following initial value problems and plot the solutions for serveral variables of ynaught a)dy/dt = y+5 I got to the point where I have: y= ce^t + 5 they give y(0)=y(naught) so I tried plugging in 0,0 and got c to be 5. but the answer
asked by sara 
analytical chemistry
a buffer solution is 0.2M in acetic acid and in sodium acetate. Calculate the change in pH upon adding 1.0ml of 0.1M hydrochloric acid to 10ml of this solution.(Given pKA of acetic acid is 4.76)
asked by woo 
chemistry
The molar volume of an ideal gas is
asked by Xaim 
Goverment
the president can choose to rid of democracy a. true b. false
asked by Cat 
precalculus 11
I have a question that two ski decide to have a race. I need show a graph of height versus time of the two skiers going over a jump. I am assuming that both skiers graphs would be parabola's and have a maximum height with both graphs opening downward.
asked by george 
Maths
2,x,y are the first three terms of an arithmetic sequence.If the 2nd term is decreased by 1.The three terms will form a geometric sequence.calculate x and y and my working out is that if i said x1
asked by Luhle qwabe 
chemistry
Ksp fo CaSO4 is 6.1*10?5. how many grams of CaCl2 must be added to 500ml of 0.010M H2SO4 to just start preciptation of CaSO4? I cant figure this out at all.
asked by Samantha 
further mathematic
find the gradent of the lime parallel to the line whose gradent is 3
asked by Alade samuel 
geography
what is the capital of fiji
asked by ricky 
English
I'll have one hamburger. 1. Anything else? 2. Will you have anything else? 3. Do you want anything else? 4. Do you want to have anything else?  Can we use the others instead of #1?
asked by rfvv 
English
1. I will transfer you to my manager. ================== In which situation, can we use this expression? What other expressions are similar to 'transfer' here?
asked by rfvv 
Government
Which of the following is NOT considered an economic goal?
asked by Anonymous 
Stats
A researcher uses a matched subjects design to investigate whether single people who own pets are generally happier than single people without pets. A mood inventory questionnaire is administered to a group of 20 to 29 year old non pet owners and a
asked by Evelyn 
algebra
Solve 2 x^2 + 3 x  6 = 0. The solutions are x_1 = and x_2 =
asked by kim 
precalculus 11
a launch window of 8:00 to 12:00. If t represents the launch time then what is an acceptable range of values for launch times? My thoughts are on this is that the scientist have a window of 4 hours which can include 8:00 and 12:00 but cannot exceed them.
asked by george 
Science
What is the mass if a bag if its weight is 9.5N? What is its weight when it is brought to the moon?
asked by Jeric 
Jc motumi
What is the south African government providing and to whom?
asked by Lebohang 
precalculus 11
x/(x3) + 2x/(x+2) (x1) x (x2) (x+2)/(x3)(x3) my question is should i multiply first and then do the adding or subtracting through a LCD or should i do the adding first?
asked by george 
english
anguage that is important to the story and exact dialogue that is important to the message or tone makes: sharing the book difficult for the teacher. for a poor choice to share with young children. a story better when acted out with puppets instead of
asked by Anonymous 
math
I need help thank you what is the volume of the prism High= 12 Base=14 side= 9 my answer was 756.
asked by siulanis perez 
math
find the unknown lenght of a rectagular prism. Lenght=15 volume=180 ft square with= 4 ft my answer is x=120
asked by siulanis perez 
math
what is the volume of the rectangular prism w=7 l=23 my answer was 644
asked by siulanis perez 
math
what is the surface area of the triangle prism. b=9 h=12 side=7 side=15 the answer is 413.39
asked by siulanis perez 
math
what is the volume of the inside cylinder to the nearest whole number. use 3.14 for pi. r=8 h=18 the other top part is 5. my answer was 508.68 and rounding is 509
asked by siulanis perez 
Government
Iowa has to honor a marriage that was granted in Indiana. True False Im so confuse
asked by Bob 
FRENCH!
Please help fix my sentences. Please keep in mind my past, present, and future tenses. You've been a great help Sra.Mme. 1.) This week, I went to my cousins house. 2.) We had a community gathering. 3.) I met so many new people. 4.) The gathering is fun.
asked by Gabs 
Life Orintation
. Research and briefly discuss the following processes that the community must engage whenever there is an issue before and during a protest: how to engage in a protest, protest restrictions,permit to hold a protest,activities during a protest,as well as
asked by Smangaliso 
Algebra
In interval notation what is 78x
asked by kim 
mechanics
a 20N sphere A is released from rest when angle at A is 90° and strike a 25 N block B which is at rest.if coefficient of restitution between the sphere and block is 0.75 and that the coefficient of kinetic friction between block and floor is 0.25. How far
asked by pankaj sharma 
chemistry
The ksp for Al(OH)3 is 3.7*5 at 20 degrees. What is the solubility of Al(OH)3 in grams per litre?
asked by Lisa 
chemistry
The mechanism of solubility depends on the solute and solvent. Describe on an ionic or molecular scale how each of the following dissolve: a.NaCl in H2O b.I2 in CCl4 c.CH3CH2OH in H2O
asked by Lisa 
Algebra
In interval notation what is 207x+1>=6
asked by kim 
French!
I fixed this one from the previous previous one. Please check. Merci. éüûà 1.) Cette semaine, je suis allée à la maison. 2.) Je me suis détendu parce que je jeûnais. 3.) Ma famille et moi avons rompu notre jeûne au coucher du soleil. 4.)
asked by Gabs 
chemistry
How many equivalents of an acid or base are in the following? 0.43mol Mg(OH)2 and 2.8g Mg(OH)2?
asked by jennifer 
algebra
The diameter of the base of a cone is 5 ft, and the slant height is 7 ft
asked by lisa 
furthe math
find the gradent of the lind parallel to the line whose gradent is 3
asked by Anonymous 
physics
the lines of force of a magnetic field do not cross. why is this so
asked by alade olushola 
ENVM
Review the three most significant adverse environmental impacts you identified in Week Four for the facility you are working with in your Capstone project and suggest actions that the facility might take to eliminate or mitigate them. Restrict your answer
asked by Anonymous 
secondary
find gradient of y plus 2x divide by 4 equal x divide by 3
asked by stanil maya 
Science Help. Thank You! (:
how does petroleum affect the environment? please no links thank you! (:
asked by ilovelasagna 
Science
What is the atmosphere's role in the exchange of gases on Earth?
asked by Victoria 
Algebra 2
Can someone please tell me how to solve and graph this system of trinomial quadratic inequalities? {y is greater than or equal to x^2+6x+12} {y
asked by Margaret 
FRENCH!
Please check these sentences for a story. Thankyou again Mme. 1.) This week, I went home. 2.) I relaxed because I was fasting. 3.) My family and I broke our fast at sunset. 4.) Today, I am fasting. 5.) Tomorrow, I will go to the mosque and pray.
asked by Gabs 
FRENCH1
é ü û à Please correct. I did my best to correct each sentence. 1.) Cette semaine nous allon à Seattle. 2.) Nous visité notre famille. 3.) Nous avons dépensé beaucoup de temps avec ils à une mariage et pendant camp. 4.) Aujourd'hui, je suis aller
asked by Gabs 
Algebra 2
Can someone please tell me how to solve and graph this system of trinomial quadratic inequalities? {y is greater than or equal to x^2+6x+12} {y
asked by Margaret 
science
An astronaut has a mass of100kg. She recedes from her spacecraft using spurts of gas from a small unit on her back. If the force generated by the gas spurt is 50N, calculate her acceleration.
asked by april 
cubic function
Just need help on the first 3 steps. I have tried to factoring it, its like there are no factors. x^33x^211x+1=0
asked by Gibbons 
Mathematics
What are adjusted residuals?
asked by Britani 
Math
Think of a fivedigit number composed of odd numbers. The thousands digit is two less than the ten thousands digit but two more than the hundreds digit. The tens digit is two more than ones digit which is four less than the hundreds digit?
asked by Maitess 
Math
The question is: A gardener wishes to create a rectangular bed. There are 70 meters of fencing wire which will be used to fence three sides of the garden bed, with a brick wall forming the fourth side. Calculate the maximum area of the garden bed that can
asked by Side length of a question help 
math
There is 70m of fencing wire which is used to create 3 sides, brick wall is used for the 4th side. Calculate the maximum area of the rectangle, and state it's dimensions. (I got the correct maximum area but can't figure out how to get the side lengths.) I
asked by Side length of a question help 
Economics
What are the costs and consequences of providing welfare
asked by Lusanda 
math
the billions period has three different even digits whose sum is 12. each of the other places is occupied by 8. what is the number?
asked by Anonymous 
socialology
Describe a situation in which you might see a gesselschaft community partnered with mechanical solidarity.
asked by PETER 
english
hello admin,i have an english homework and i confuse with this question 1 robin still felt  of the accident several months later. a reaction b effects c affects d contraction and i answer a,is it wrong? 2 despite the peer pressure, jessica held
asked by grace