General Chemistry Answers

FOR EXAMPLE:

C₃H₆O + 4O₂ → 3CO₂ + 3H₂O ∆H=-1790kJ

Using 1 mole of C₃H₆O: -1790kJ

Using 2 moles of C₃H₆O: 2(-1790kJ)

Consider the information above on the combustion of acetone. Solve

the following problem involving the Enthalpy of Chemical Reactions. Show yours solutions. You may refer to the lecture notes for sample problems.

Calculate the amount of heat released during the combustion of

a. 0.75 mole of C3H6O

b. 120g of C3H6O

Sucrose (table sugar) has a molar mass of 342.30 g/mole.

342.30 g/mole. How many sucrose molecules are in a 8.80-pound

8.80-pound bag of sugar? (1 pound=453.6 grams.)

A 43.7 L automobile airbag, a sample of gaseous nitrogen, has a pressure of 645 mmHg. Under constant temperature, the airbag’s pressure was changed to 517 mmHg. What would be the final volume of a gas? Make a conclusion about the relationship of pressure and volume.

In an experiment 1.90g of NH3 reacts with 4.96 of O2

4NH3(g) +5O2(g)=4NO(g)+6H2O(g)

Which is a limiting reactant

All aqueous mixtures must contain

at what Kekvin temperature will 37.5 mol of Ar occupy a volume of 725 L at a pressure of 675 torr ?

Arrange the following according to increasing vapor pressure:

1m NaCl, 1m CaCl₂, 1m C₆H₁₂O₆, 1m AlCl₃

Which part of the meniscus should the volume be measured from?

It is appropriate to return any excess solvent or solution back into the reagent bottle

I characteristic of a substance that you can’t observe or measure is called a