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Topic: Urgent- Exam Review  (Read 2363 times)

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Offline croatianboii

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Urgent- Exam Review
« on: January 20, 2009, 07:13:57 PM »
My exam for chemistry is tomorrow and I need help with a few questions.

1) Use NaF as the example to explain how water dissolves solutes.

2) The density of a gas is 5g/L at 79 degrees celcius and and 100kPa. Calculate the molar mass of the gas.

3) A 7mL sample of acetic acid was titrated using 3mL of 4M NaOH. Use the equation CH3COOH(aq)+NaOH(aq) yields CH3COONa(aq)+H20(l) to answer the following.
a) calculate the number of moles of base used in the titration.
b)calculate the moles of acid present in the sample.
c)calculate the concentration of the acid.

Offline Astrokel

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Re: Urgent- Exam Review
« Reply #1 on: January 20, 2009, 08:11:17 PM »
You need to show some attempt!
No matters what results are waiting for us, it's nothing but the DESTINY!!!!!!!!!!!!

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