12/02/12

calculating the van't Hoff factor
When 9.12 g of HCl was dissolved in 190 g of water, the freezing point of the solution was -4.65oC.  What is the value of the van't Hoff factor for HCl? Here is what I did- I know that I use:... more
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12/01/12

What is the value of deltaE in kilojoules if the reaction is carried out at a constant pressure of 28.0 atom and the volume change is -2.35 L?
The reaction between bleach and ammonia to yield chlorine gas has a deltaH= -422 kJ What is the value of deltaE in kilojoules if the reaction is carried out at a constant pressure of 28.0 atom and... more
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11/29/12

x^1/2 - x^1/4 - 2 = 0. Use u =
You do not need to solve.  Just use u to replace x.
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11/29/12

At what rate is the diagonal of a cube increasing if its edges are increasing at a rate of 2 cm/s
This is a related rates problem  
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11/27/12

7^(3/x)=5^(2-x)
I'm supposed to solve using logrithims
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11/27/12

Prove that lim(n->infinity) (1/n) = 0. Make a proof with definition of limit.
Make a proof about definition of limit.
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11/22/12

If y varies inversely as x and x is 6 when y is 13, what is x when y is 8?
If y varies inversely as x and x is 6 when y is 13, what is x when y is 8?
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11/20/12

solve 2x^2/3-5x^1/3=3
how do you solve this?
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11/18/12

what is the square root of 58
math problem please help
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11/17/12

The first swing of the pendulum is 25cm. if each swing is 75% of the preceding swing how far does the pendulum travel before coming to a rest?
Evaluate the following series.
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11/17/12

What are the first 3 common multiples of 6, 19, and 38?
I am having trouble finding the answer for this, if anyone could help me with this please do help.
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11/17/12

How does these chemical equation balance, step by step? Why do they balance this way?
I already know how they balnace I just don't understand how they balance. why does the O(2*) balance to 25? 2 C(8*)H(18*) + 25 0(2) yields 16 CO(2*) + 18 H(2*)O These ones have me stumped as... more
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11/16/12

4 divided by i
I need help with the problem 4/i
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11/06/12

any number that has 9 factor also has 3 as a factor. why is this
any number that has 9 as a factor also has 3 as a factor why is this
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11/02/12

When will the hare catch the tortoise?
a hare runs 50 ft/sec and a tortoise who is 1000 ft ahead of the hare runs 0.25 ft/sec. Assuming they both start at time t=0, what will be the value of t when the hare finally catches up?
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