Wednesday

September 2, 2015
Total # Posts: 362

**Chemistry**

Given a 10.0g sample of MgCO3*5H2O, what weight of anhydrous magnesium carbonate can be obtained after driving off the water? The GFM of the sample is 174.3amu. Now.. how do I go about finding the weight of the magnesium carbonate?
*November 9, 2009*

**Chemistry**

CaSO4.2H2O ==> CaSO4 + 2H2O moles CaSO4.2H2O = 15.00 g x (1 mole CaSO4.2H2O/172.172) = 0.08712 moles. moles CaSO4 = same. grams CaSO4 = moles CaSO4 x molar mass CaSO4 = ?? Wait,.. how do I know the moles CaSO4? do I do .08712* CaSO4's gfm?
*November 9, 2009*

**chemistry**

so then would i find the gfm of the CaSO4? and get 136.2 as my answer?
*November 8, 2009*

**chemistry**

if you heat 15.00g of the hydrate CaSO4*2H20, and drive off the water, what is the weight of the anhydrous salt remaining? How do I go about solving this?
*November 8, 2009*

**Chemistry**

calculate the percent water in CaSO4*2H20 20.9%?
*November 8, 2009*

**Chemistry**

Ah, yes. I reversed it Thank you!
*November 8, 2009*

**Chemistry**

on heating the hydrate CaSO4*2H2O, how many moles of water should be driven off per mole of hydrate? 1 mole?
*November 8, 2009*

**Chemistry**

34.48%, percentage water of hydrate, final answer?
*November 8, 2009*

**physics**

A race car accelerates from rest at 5.7m/s squared. how fast will it be going at the end of that time? i need the abc method...( a-all variables, unknown 1st...b-right formula and algebraically rearrange it..c- solve it0
*October 20, 2009*

**HCA 240**

Radio Ad: Write a 150 to 200 word script for a radio ad that promotes a healthy musculoskeletal system in old age. Address the risk factors for arthritis, osteoporosis, and injuries from falls. Incorate prevention strategies such as proper nutrition (calcium, diet).
*September 13, 2009*

**history**

Struggling to answer completely and logically, please critique the below: Question: What were the similarities and differences between the five regions of British Colonial America and what factors worked to create a shared “American Identity” by the mid 18th century...
*September 9, 2009*

**5th grade Math**

i do not know
*September 4, 2009*

**History**

what were the similarities and differences between the five regions of British colonial America and what factors worked to create a shared American identity by the mid 18th century ?
*August 27, 2009*

**social studies**

what were the similarities and differences between the five regions of British colonial America and what factors worked to create a shared American identity by the mid 18th century
*August 27, 2009*

**HCA 230**

I guest I really don't understand this assignment. Compose a list identifying the major components of health communication. Who is involved in each component? How does each component promote health communication? If not utilized, how would it reduce health communication? ...
*August 24, 2009*

**HCA 230**

Thank You! C
*August 24, 2009*

**HCA 230**

I don't understand it. I guess my question is what do they mean by components.
*August 24, 2009*

**HCA 230**

Compose a list identifying the major components of health communication. Who is involved in each component? How does each component promote health communication? If not utilized, how would it reduce health communication? Provide examples.
*August 24, 2009*

**HCA 220**

What are the most important concepts you have learned in this course? How can you apply them to your life? What difference can the topic in this course make in your everyday life?
*August 16, 2009*

**SCI 275**

Urbanization, Describe environmental benefits and challenges of urbanization; describe two 1996 Dubai award winners
*July 18, 2009*

**History**

1. For the safety of the children and the continuity of the British civilization. 2.Some knew it was for the greater good, some thought it was to separate the family, some thought government played a major influence on a person private life.
*May 10, 2009*

**Genetics**

How could you use a reporter gene to see if a certain gene was an activator for an operon? Would you insert the reporter in front of the operon? Or with the activator gene?
*April 29, 2009*

**College Algebra/Inequalities**

solve the inequality x+3/x-2 less then or equal to 0
*March 20, 2009*

**Science**

I really don't understand this please can you give me an example? Am desperate!
*March 8, 2009*

**physics**

thanks for your help!!
*February 15, 2009*

**physics**

FYI - The symbols for ohms didn't work, that's what the U's with accents are.
*February 15, 2009*

**physics**

I'm confused as how to find the current for a circuit with both parallel and series resistors? R1 = 2 Ù R2 = 5 Ù R3 = 11 Ù R4 = 10 Ù V = 7 V R2 and R4 are parallel, then these are in series with R3, then this whole system is in parallel with R1...
*February 15, 2009*

**chemistry**

ii) What is the formula of 1, 3-butadiene
*February 13, 2009*

**history**

I need help with unscrambling these letters into 2 words ecnoevprmisrirtam.only hint it has to do with canada.
*January 30, 2009*

**us history**

its b
*January 17, 2009*

**artist**

WHICH ARTISTS HAVE BEEN IN THE ROMANTICISM MOVEMENT, AND PAINTED lANDSCAPES?
*November 30, 2008*

**com 140**

As a project manager, you are looking forward to completing your current project and then taking a European vacation with your bonus money. Shortly before bonuses are expected, however, you realize your team just missed reaching the financial goal for the quarter. As a result...
*August 29, 2008*

**algebra**

I am really stuck, can someone please help me with this? Multiply and simplify by factoring. Assume that all expressions under radcals represent nonnegative numbers. (type in radical form) ∛(y^13 ) ∛(16y^14 )
*July 14, 2008*

**algebra**

I have a computer progam that allows me to create the symbols.
*July 14, 2008*

**algebra**

Can someone please help me with this? Solve ∛(x+1) = 3
*July 14, 2008*

**algebra**

Do polymonials contain rational numbers as exponents?
*July 10, 2008*

**algebra**

Can someoe please help me figure this out? During the first part of a trip, a canoeist travels 63 miles at a certain speed. The canoeist travels 6 miles on the second part of the trip at a speed of 5 mph. slower. The total time for the trip is 5 hours. 1. What was the speed (...
*July 10, 2008*

**algebra**

Can someone show me how this would be simplifyed? 5^1/2 * 5^1/4
*July 10, 2008*

**algebra**

Is this a true statement? Polynomials and radical expressions differ because radical expressions contain rational numbers as exponents and polynomials do not.
*July 8, 2008*

**algebra**

Why is it important to simplify radical expressions before adding or subtracting?
*July 6, 2008*

**algebra**

How is adding radical exressions similar and different to adding polynomial expressions?
*July 6, 2008*

**algebra**

How would you explain how the laws of exponents work with rational exponents?
*July 6, 2008*

**algebra**

I think that the answer is 1173, please disregard:)
*July 4, 2008*

**algebra**

Cans omeone le me know if I arrived at the correct answer? To determine the number of deer in a game preserve, a conservationist catches 391 deer, tags them and lets them lose. Later 534 deer are caught; 178 of them are tagged. How many deer are in the preserve? I came up with...
*July 4, 2008*

**algebra**

I don't understand how to do this, can someone please help me? To determine the number of deer in a game preserve, a conservationist catches 391 deer, tags them and lets them lose. Later 534 deer are caught; 178 of them are tagged. How many total deer are in the preserve?
*July 4, 2008*

**algebra**

Find the LCM for u^3 + 6u^2 + 9u, u^2 - 6u I came up with u(u+3)(u-6) is this correct?
*July 3, 2008*

**algebra**

Can someone please help me, I'm stuck. Find all numbers for which the rational expression is undefined. 7/(3v+7)
*July 2, 2008*

**algebra**

I am having trouble with this. Add (simplify if possible) (x^2 + 11x)/(x^2 - 3x) + (x^2 - 6x)/(x^2 - 3x) I actully came up with two possible answers. (2x+5)/x-3 and (2x^2-5)/x-6x I'm not sure which answer is correct.
*July 1, 2008*

**algebra**

Find the LCM 10b^6 c^6, 5b^5 c^4, 14b^3 c^7 What is the LCM? I came up with 70(b^6)(c^7) Did I do this correctly? Thank you
*July 1, 2008*

**algebra**

Find the LCM 10b^6 c^6, 5b^5 c^4, 14b^3 c^7 What is the LCM? I came up with 70(b^6)(c^7) Did I do this correctly? Thank you
*July 1, 2008*

**algebra**

I am having trouble with this. Add (simplify if possible) (x^2 + 11x)/(x^2 - 3x) + (x^2 - 6x)/(x^2 - 3x) I actully came up with two possible answers. (2x+5)/x-3 and (2x^2-5)/x-6x I'm not sure which answer is correct.
*July 1, 2008*

**algebra**

6x^3/36x)*(49v^4/7v^2) =[(6/36)*(x^3-1)]*[(49/7)*(v^4-2)] =[(x^2)/6]*(7v^2) =(7v^2x^2)/6 Is this the right answer? I feel like I missed something.
*July 1, 2008*

**algebra**

Can someone let me know if I hve the correct answer? Divide and simplify (x^2-16)/(49x+196)÷(x-4)/28 I came up with the answer 28/49 is this correct or can it be simplified more?
*July 1, 2008*

**algebra**

I do not think that this has a solution, is that correct? (y-3)/(y-6)=3/(y-6)
*July 1, 2008*

**algebra**

I can't figure this out, can someone please help me? Add 6/(x-4)+ 6/(x+4)
*July 1, 2008*

**algebra**

Thank you:)
*June 30, 2008*

**algebra**

I am having trouble with this, can someone please help me? Add (simplify if possible) x^2 + 11x x^2 - 6x __________ + __________ x^2 -3x x^2 - 3x
*June 30, 2008*

**algebra**

I am having trouble with this, can someone please help me? Add (simplify if possible) x^2 + 11x/x^2 - 3x + x^2 - 6x/x^2 - 3x
*June 30, 2008*

**algebra**

4-v/v-9 - 2v-5/9-v I came up with v-1/v-9 Is this correct?
*June 30, 2008*

**algebra**

Solve 8/y+4 = 7/y-7 y=84 did I solve this correctly?
*June 30, 2008*

**algebra**

Solve 8/y+4 = 7/y-7 y=84 did I solve this correctly?
*June 30, 2008*

**algebra**

This problem asks me to subtract and simplify if possible 4-v/v-9 - 2v-5/9-v I came up with v-1/v-9 Is this correct?
*June 30, 2008*

**algebra**

I am having trouble figuring this out. ADD (r - 6s + 3) + (7r + 5s) + (s+5)
*June 16, 2008*

**algebra**

On a graph, what is the slope of (-2,0); (0,1)?
*June 4, 2008*

**algebra**

I wrote this wrong on my last post, it should have read, On a graph, what is the slope of (-2,0); (0,1)?
*June 4, 2008*

**algebra**

On a graph, what would be the slope of (0,-2); (0,1)?
*June 4, 2008*

**algebra**

Using the intercepts to graph the equation X + 5y = 10 What points would I plot on the graph?
*June 4, 2008*

**algebra**

Using the intercepts to graph the equation X + 5y = 10 What points would I plot on the graph?
*June 4, 2008*

**algebra**

How would I use the intercepts to graph the equation x+2y=4 what points would I need to plot on the graph?
*June 4, 2008*

**algebra**

Is this pair of lines parallel, perpendicular, or neither? 2x+5y=7 5x-2y=8
*June 3, 2008*

**algebra**

7[76-(-47-59)]= I am to simplify this. Is the correct answer 638?
*June 3, 2008*

**algebra**

On a graph, what is the slope of the line -2,1?
*June 3, 2008*

**algebra**

7[76-(-47-59)]= I am to simplify this. Is the correct answer 638?
*June 3, 2008*

**algebra**

How would you solve this using the multiplication principle? -7x>1/15
*June 2, 2008*

**algebra**

I need help with these please. What is the solution for 0.7x+5¡Ü1.1x-8? What would be the solution for, 15a+5b-12a-8b=
*June 2, 2008*

**algebra**

Can someone help me with this please? I am trying to find the solution for 5/(4x) + 1/(8x) = 5/8 + x x = ? would the answer be x=5/3?
*June 2, 2008*

**algebra**

Would the answer be x=5/3?
*June 2, 2008*

**algebra**

Can someone help me with this please? I am trying to find the solution for 5/4x + 1/8x = 5/8 + x x = ?
*June 2, 2008*

**algebra**

What would be the slope of -3?
*June 2, 2008*

**algebra**

Graph the system of inequalities x (lesser or equal to sign)2 y (greater or equal to sign)-2x+4 I am having trouble understanding what points to plot on the graph and also how the graph should be shaded (if at all).
*May 26, 2008*

**algebra**

I am having problems with both of these questions. 1. Hockey teams recieve 2 points when they win and 1 point when they tie. One season, a team won a championship with 67 points. They won 11 more games than they tied. How many wins and ties did the team have? Wins? Ties?
*May 26, 2008*

**algebra**

Can someone please help me with this? Use the set-builder notation to describe the solution. 3(3-8x)+5x<2(9+6x)
*May 26, 2008*

**I ddo not understand notation**

sorry, it didn't post correctly. Graph the system of inequalities x (lesser or equal to sign)2 y (greater or equal to sign)-2x+4 I am having trouble understanding what points to plot on the graph and also how the graph should be shaded (if at all).
*May 26, 2008*

**algebra**

Graph the system of inequalities x¡Ü2 y¡Ý-2x+4 I am having trouble understanding what points to plot on the graph and also how the graph should be shaded (if at all).
*May 26, 2008*

**algebra**

Can someone please help me with this? Use the set-builder notation to describe the solution. 3(3-8x)+5x<2(9+6x) {x„ x ?,?} Thank you
*May 26, 2008*

**algebra**

I hope that someone can help me with this. 0.3(11x+4)is greater or equal to 2.1-(x+8) I came up with the answer x less than or equal to -71/43 Is this correct?
*May 26, 2008*

**algebra**

The coffee counter charges $9.00 per pound for Kenyan French Roast coffee and $8.00 per pound for Sumatran coffee. How much of each type should be used to make a 20-lb blend that sells for $8.40 per pound? Answer: Kenyan-8 lb; Sumatran-12 lb. Can someone help me with how they...
*May 19, 2008*

**algebra**

What are some examples of real life situations where you might use polynomial division?
*May 19, 2008*

**algebra**

What are some examples of real life situations where you might use polynomial division?
*May 19, 2008*

**a**

What are some examples of real life situations where you might use polynomial division?
*May 19, 2008*

**Science**

what instrument is used to measure water vapor content of air?
*May 13, 2008*

**algebra**

Casn someone help me please? I have a graph that shows the point on the y-axis to be 5 and the point on the x-axis to be 5. I need to find a) f(3) b) the Domain c) any x valuesfor which f(x)=1 d) the Range
*May 13, 2008*

**algebra**

In 1920 the record for a certain race was 45.4 sec. in 1950, it was 41.5 sec. let R(t) = the record in the race and t the number of years since 1920. R(t)=? What is the predicted record for 2003? What is the predicted record for 2006? in what year will the predicted record be ...
*May 12, 2008*

**algebra**

what is the slope intercept equation for 8 and y intercept (0,5) y=? I got y=8x+5 is this correct?
*May 12, 2008*

**algebra**

I got y=8x+5 is this correct?
*May 12, 2008*

**algebra**

what is the slope intercept equation for 8 and y intercept (0,5) y=?
*May 12, 2008*

**algebra**

x+2y=7 2x+4y=5 are the graphs of these equations perpendicular?
*May 12, 2008*

**algebra**

for the nonlinear equation f(x)=4x+4 x=2 x=4 is it correct to say that two inputs would be 12,20. If not could you help me with two inputs? Thank you
*May 7, 2008*

**algebra**

can someone help me with the steps for finding how f(0);f(7a) are the inputs for the nonlinear function? f(x) = 3x² – 2x + 8
*May 6, 2008*