Monday

May 2, 2016
Total # Posts: 290

**Chemistry**

The post that I followed for #1 ended up with the wrong answer
*September 11, 2013*

**Chemistry**

A 16.0 g sample of a compound known to contain 3 ion species is dissolved in 100. g of water. The boiling point of the solution is 103.1°C. What is the molar mass of the compound?
*September 11, 2013*

**Chemistry**

Hard ball candy is prepared from boiling an aqueous sugar solution that has a boiling point of 260.°F. What is the molality of this solution?
*September 11, 2013*

**Chemistry**

What is the freezing point of a solution of sucrose (table sugar), a nonelectrolyte, that contains 60.0 g of C12H22O11 dissolved in 413 g of water?
*September 11, 2013*

**Chemistry**

A solution is made by mixing 90.6 g of magnesium sulfate heptahydrate with 2320.0 g of water. 690.00 mL of the solution has a mass of 745.20 g. What is the molarity of the magnesium sulfate solution?
*September 11, 2013*

**Chemistry**

If you are making 230.0 mL of 2.70% (m/m) CuSO45 H2O, how many grams of the solute should you use?
*September 11, 2013*

**Trig**

Suppose a CD player makes 48 revolutions per minute. Through how many degrees will a point on the edge of a CD move in 1 minute? In 2 sec?
*July 5, 2013*

**Trig**

A tire is rotating 600 times per minute. Through how many degrees does a point on the edge of the tire move in 1 minute?
*July 5, 2013*

**Chemistry**

A tire is rotating 600 times per minute. Through how many degrees does a point on the edge of the tire move in 1 minute? In 1 second?
*July 5, 2013*

**Chemistry**

Suppose a CAV player makes 48 revolutions per minute. Through how many degrees will a point on the edge of a CD move in 1 minute? In 2 sec?
*July 5, 2013*

**Math**

What is 36 over 156 in simplest form?
*June 26, 2013*

**statistics**

Let x and y be the amounts of time (in minutes) that a particular commuter must wait for a train on two independently selected days. Define a new random variable w by w = x + y, the sum of the two waiting times. The set of possible values for w is the interval from 0 to 2a (...
*June 10, 2013*

**grammar please help!**

thank you so much!
*May 1, 2013*

**grammar please help!**

1.D 2.A?
*May 1, 2013*

**grammar please help!**

I still need help on 1 and 2. Identify the object of the preposition in each of the following sentences. 1. Ashley and her father arrived home from work. a. and b. father c. from d. work 2. Ashley put her journalism books in the new bookcase. a. bookcase b. put c. new d. in ...
*May 1, 2013*

**6th grade grammar please help**

thank you but I'm still confused on 1 and 3 could you explain why its not from and in.
*April 30, 2013*

**6th grade grammar please help**

I need a good grade in grammar so please check my answers! Identify the object of the preposition in each of the following sentences. 1. Ashley and her father arrived home from work. a. and b . father c. from d. work 2. Ashley’s bedroom was across the hall. a. bedroom b. ...
*April 30, 2013*

**Calculus**

Find dy/dx by implicit differentiation for x^2 - 2xy + y^3 = C
*April 28, 2013*

**Chemistry**

How many grams of CuSO4 * 5H2O are needed to prepare 100mL of a 0.10 M solution ?
*April 4, 2013*

**Chemistry**

Identify the atom that increases in oxidation number in the following redox reaction. 2MnO2 + 2K2CO3 + O2 2KMnO4 + 2CO2 *A.) Mn B.) O C.) K D.) C Please show work Thank you.
*March 21, 2013*

**Spanish: check answers**

Ms. Sue the answers are right under 19, It says answers and I listed my them. Thank You MathMat.
*March 21, 2013*

**Spanish: check answers**

Questions: 3. Paella is a dish like tacos. a dish made of rice, seafood, and vegetables eaten in Spain. another name for enchiladas. 4. Fast-food restaurants in the Spanish-speaking world are generally very popular with adults. look similar to the ones in the United States and...
*March 21, 2013*

**Us History**

How did social responsibility of businesses change during the Great Depression era?
*March 5, 2013*

**Calculus**

Determine convergence or divergence for the following series. State the tests used and justify your answers. Sum (infinity, n=1) 1/(1+e^-n) Sum (infinity, n=1) (2*4*6...2n)/n! Sum (infinity, n=0) (n-6)/n Sum (infinity, n=0) (n-6)/n! Sum (infinity, n=0) (100n^14)/4^n
*March 4, 2013*

**Calculus**

Determine convergence of divergence. If convergent, find the sum. Sum (infinity, n = 0) (e/pi)^n
*March 4, 2013*

**Spanish 1**

Complete the sentences with the correct form of ir. todos Los Dias, yo ____ a la escuela
*February 26, 2013*

**English**

period is right
*February 12, 2013*

**math**

Which units would you use to measure the area of a rectangle with L=1m and W=34 cm? Explain
*February 12, 2013*

**math**

i write out all the whole numbers,starting from 1,If i wrote 1994 digits altogether,what was the last complete number i wrote down
*February 10, 2013*

**math**

what is the interior angle of a regular polygon
*February 10, 2013*

**math**

Write the fraction in the simplest form. 12/56: 3/30: 5/25: 9/39: 6/54: 2/100: 8/18: THANKS
*January 24, 2013*

**math**

i thought you would add?
*January 16, 2013*

**math**

Jeremy collected nickels for one week. He is making stacks of his nickels to determine how many he has. The thickness of one nickel is 1/4 in. How tall is a stack of 4 nickels? 3 nickels, 2 nickels?
*January 16, 2013*

**Math**

Is yo last name akres/ acres, or Whatever.
*January 14, 2013*

**Science, Heat Transfer**

someone please help me!
*January 14, 2013*

**Science, Heat Transfer**

list 3 forms of radiation from the sun. how are they alike. how do they differ?
*January 14, 2013*

**math**

infinite
*January 14, 2013*

**math please help imedietely**

if for one row she needs 3red 6yellow and 3white, then for 8rows, 8x3 8x6 and 8x3= 24, 48, 24. :)
*January 14, 2013*

**its urgent math i need the answer fast**

first how many units?
*January 14, 2013*

**5 th grade math**

D.
*January 10, 2013*

**Algebra 1**

40 bicycles
*January 9, 2013*

**Geometry**

a baseball diamond is a square 27 cm on a side. how far is the homeplate from the second base?
*January 4, 2013*

**Earth-Space Science**

what factors might affect the length of the rays after an impact?
*November 19, 2012*

**Maths**

Let f(x) = √(x^2 + 1) - 1 (taking the positive real square root, as usual). When x = 10^-3, compute f(x), working to 5 significant figures at every stage of the calculation. Show (algebraically) that f(x) =(x^2)/[√(x^2 + 1) +1]. Use this expression for f to compute...
*November 4, 2012*

**geometry**

A regular pentagonal pyramid has a side length of 4 mm, an apothem that measures 3 mm, and a height of 4.1 mm. What is the volume of the pyramid?
*November 2, 2012*

**Calculus (Urgent Help)**

The graph of y=cos x * ln cos^2x has seven horizontal tangent lines on the interval [0,2pi]. Find the x-coordinate of all points at which these tangent lines occur.
*October 25, 2012*

**math**

when 8 children go on a picnic,6/8 wear jeans. how many wear jeans
*October 17, 2012*

**algebra**

The reflection of the tree in the lake is 49 in long. If your shadow in the lake is 14 in long and you are 5 ft, how tall is the tree? Put your answer as inches.
*October 11, 2012*

**social studies**

what state can be found at 60 degrees north latitude and 150 degrees west longitude?
*October 10, 2012*

**Physics**

Leroy, who has a mass of 110 , is skateboarding at 9.4 when he smacks into a brick wall and comes to a dead stop in 0.2. Find his deceleration.Find the force of impact. (ouch!)
*September 12, 2012*

**Math-Algebra-1**

graph 2x -7=0
*September 5, 2012*

**grammer**

Is is the simple predicate?
*August 22, 2012*

**grammer**

What is the simple subject and simple predicate in the sentence The smell of cooking is delicious to the hungry campers?
*August 22, 2012*

**Algebra**

2,250 watts to horsepower (Round answer to the nearest thousandth.)
*July 1, 2012*

**algebra**

38 milliamps to amps (Round answer to the nearest thousandth.)
*July 1, 2012*

**Algebra**

32 ½ meters to feet (Round answer to the nearest thousandth.)
*July 1, 2012*

**algebra**

1,200 mils to inches (Round answer to the nearest tenth.)
*July 1, 2012*

**physics**

the jet has a speed of 250 miles/hr, carried a bomb of 20 kgs, in 3000 ft. how seconds the bomb fall in to 3000 ft?
*June 29, 2012*

**physics**

the jet has a speed of 250 miles/hr, carried a bomb of 20 kgs, im 3000 ft. how seconds the bomb fall in to 3000 ft?
*June 29, 2012*

**Honors English III**

Write your own journal entry from the perspective of a member of Bradford's colony. What do you think of these unruly pirates? What shocks you the most about these surly characters? How do the manners of the pirates differ from yours?
*June 14, 2012*

**cook**

I answered .B lower cost. but it was wrong what's the real answer
*June 13, 2012*

**Trigonometry**

find all values of theta in the interval 0<theta<360 that satisfy the equation 3cos 2theta + 2 sin theta+1=0
*May 20, 2012*

**5th Grade Writing**

ikd
*May 17, 2012*

**6th Grade Science**

what is electromagnetic energy?
*May 4, 2012*

**Social Studies**

When was hinduism invented and by who?
*April 25, 2012*

**mental maths**

what is 15 degrees lower than 7c
*April 11, 2012*

**Algebra**

9X+y=2 -4X-y=17
*April 11, 2012*

**maths**

If I am a proper fraction with a denominator of 20 and my decimal equivalent is 0.6 then what am I
*March 21, 2012*

**Chemistry**

amount of heat generated by the combustion of 245 g of CH3OH in 2CH3OH(l)+3O2(g)=2CO2+4H2O(l)
*March 19, 2012*

**History - Italy**

What is the history of the Italian sports of soccer and football. Is Italian football the same as American soccer? If so, what is Italian soccer? Thanks for your help.
*March 18, 2012*

**Physics**

If a baseball falls a vertical distance of 2.6 m from the first to the last image, what is the time interval between the first and last image?
*March 13, 2012*

**chemistry**

the question was to check all that apply: BO33- H+ H3BO22+ O2- H3BO3 OH -
*March 12, 2012*

**chemistry**

what are the solute particles present in boric acid (H3BO3)?
*March 12, 2012*

**chemistry**

CrCl3(s) + AgNO3 (aq)= AgCl(s) + Cr(NO3)3(aq) A 0.750 g sample of impure CrCl3 was removed from a bottle that contained 1.75 g of impure sample. The removed sample was dissolved in water and required 42.5 mL of 0.215 M AgNO3 solution to react with the CrCl3 in the sample. What...
*March 12, 2012*

**chemistry**

Al(s) + H2SO4(aq)-> Al2(SO4)3(aq) + H2(g) Consider the unbalanced equation above. What volume of 0.490 M H2SO4 is needed to react with excess aluminum to produce 1.60 g of Al2(SO4)3? Use a molar mass with at least as many significant figures as the data given.
*March 12, 2012*

**chemistry**

H2SO4(aq) + NaOH(aq)-> Na2SO4(aq) + H2O(l) Consider the unbalanced equation above. What is the concentration of the original sulfuric acid solution if 60.5 mL of the acid reacts with 18.0 mL of 0.110 M sodium hydroxide?
*March 12, 2012*

**chemistry**

If 180.0 mL of 0.270 M NaOH are mixed with 230.0 mL of 0.500 M NaOH, what is the molarity of the final solution? Assume the volumes are additive.
*February 27, 2012*

**chemistry**

How many mL of 4.50 M NaOH must be diluted to produce 160.0 mL of 2.50 M NaOH?
*February 27, 2012*

**statistics**

A SINGLE CARD IS SELECTED FROM A STANDARD DECK OF 52 CARDS. IF YOU KNEW THAT THE CARD WAS A PICTURE CARD, WHAT IS THE PROBABILITY THAT IT WAS ALSO RED?
*February 27, 2012*

**Chemistry**

Silver(I) nitrate and sodium sulfate react to form silver(I) sulfate and sodium nitrate. Suppose 45.98 mL of 0.060 M silver(I) nitrate solution and 26.64 mL of 0.10 M sodium sulfate solution are mixed. What is the maximum number of grams of silver(I) sulfate that can be made?
*February 22, 2012*

**Chemistry**

N2(g) + O2(g) --> N2O5(g) (a) Consider the unbalanced equation above. What is the maximum mass of N2O5 that can be produced when 43.0 g of N2 and 43.5 g O2 react?
*February 22, 2012*

**College Chemistry**

C6H6(l) + Cl2(g) --> C6Cl6(s) + HCl(g) Consider the unbalanced equation above. What is the maximum mass of each of the products that can be formed when 72.5 g of C6H6 and 49.0 g Cl2 react?
*February 22, 2012*

**physics**

What is the mass of a person who weighs 750N?
*February 19, 2012*

**cjs**

The current threat of terrorism has made many legislatures in Congress think about the United States combining all the police agencies into one national police organization. The centralization of power would stop the discombobulated nature of the 3 government levels of police ...
*February 19, 2012*

**math**

ms fuller has 2 2/6 pies left over from her party. write the number of pies left over as a fraction greater than 1
*February 13, 2012*

**science**

what is the massof fresh water(p=1.00g/cm^3) in a 72.8L tank?
*February 2, 2012*

**chemistry**

If you ran silver nitrate on tap water and distilled water,which one may show a slightly positive reaction? Why?
*January 18, 2012*

**science**

Betsy and Michael are 150 meter apart, Michael is walking toward Betsy at a constant speed of 2.5m/s. start from the rest, how long it take to meet?
*January 16, 2012*

**science**

Betsy and Michael are 150 meter apart, Michael is walking toward Betsy at a constant speed of 2.5m/s. start from the rest, how long it take to meet?
*January 16, 2012*

**JAVA PROGRAMMING**

import java.util.Scanner; public class BaseAndExponent { public static void main(String[] args) { int a; int b; Scanner scan = new Scanner(System.in); System.out.println("Base"); } }
*January 13, 2012*

**Subject agreement**

You --------to the old north church (walk) do you use (are walking) or stays the same for present tense?
*December 14, 2011*

**math**

-[-(-k)] -(-2)(-2 + k) = -k - (4k + 3)
*December 11, 2011*

**math**

-[-(-k)] -(-2)(-2 + k) = -k - (4k + 3)
*December 11, 2011*

**maths for social science**

. A project management consultant estimated that if a particular project was completed, that t years after its date of completion, P thousand persons would be direct beneficiaries of the project, where P (t) = t3/3 - 5t2 +20t, 0<t<12 For what value of t will the maximum ...
*November 7, 2011*

**calculus**

. A project management consultant estimated that if a particular project was completed, that t years after its date of completion, P thousand persons would be direct beneficiaries of the project, where P (t) = t3/3 - 5t2 +20t, 0<t<12 For what value of t will the maximum ...
*November 7, 2011*

**I NEED HELP. PLEASE**

Thank you.
*November 2, 2011*

**I NEED HELP. PLEASE**

Thanks! How would you know whether to add or subtract?
*November 2, 2011*

**I NEED HELP. PLEASE**

I do not understand point-slope and standard form. Please help me.
*November 2, 2011*