**I have the answers to the questions. I would just like to know the steps. (19 problems)**

How many moles of calcium carbonate are contained in 919 grams of calcium carbonate. Enter your answer to 2 decimal places.

How many grams of H_{3}PO_{4} are contained in 0.0844 moles of H_{3}PO_{4}

How many moles of sodium is equivalent to 8.08 x 10^{23} Na atoms? Answer to 2 decimal places

How many PF_{3} molecules are contained in 0.537 moles of phosphorus trifluoride? Once you have your answer, take the LOG of it on your calculator, and enter that number to 2 decimal places.

How many moles of Na_{2}P_{3}O_{7}contain 8.54 x 10^{24} phosphorus atoms

How many hydrogen atoms are contained in 1.64 moles of CH_{4}? Take the log of yoru answer and report it to 2 decimal places.

How many molecules are contained in 27 grams of C_{2}H_{6}? Once you have your answer, take the LOG of it on your calculator, and enter that number to 2 decimal places.

What is the mass (in grams) of 7.53 x 10^{24} molecules of C_{2}H_{6}O?

**Tougher Road Map**

Consider the reaction,

4 NH_{3} + 5 O_{2} => 4 NO + 6 H_{2}O

How many grams of NOwill be made from 85.6 moles of NH_{3}?

Give your answer to 1 decimal place.

4 NH_{3} + 5 O_{2} => 4 NO + 6 H_{2}O

How many grams of H_{2}Owill be made with 66.6 moles of NO?

Give your answer to 1 decimal place.

4 NH_{3} + 5 O_{2} => 4 NO + 6 H_{2}O

How many molecules of NOwill be made from 46.9 moles of NH_{3}? Take the log of your answer and enter it to 2 decimal places.

0.461 g of a substance X contain 7.1 x 10^{21} molecules of X. Calculate the molar mass of X in g/mol.

Propane reacts with oxygen to make carbon dioxide and water as shown:

C_{3}H_{8} + 5 O_{2} => 3 CO_{2} + 4 H_{2}O.

How many grams of water will be made with 113.9 g of carbon dioxide?

Give your answer to one decimal place.

2 B_{5}H_{9} + 12 O_{2} => 5 B_{2}O_{3} + 9 H_{2}O

How many molecules of B_{2}O_{3} will be made with 30.9 g of H_{2}O? Take the log of your answer and enter it to 2 decimal places.

3 H_{2}(g) + N_{2}(g) => 2 NH_{3}(g).

How many grams of NH_{3} will be made by the reaction of 5 moles of H_{2}(g) with 12 moles of N_{2}(g)?

Subject | Science |

Due By (Pacific Time) | 04/22/2014 11:00 am |

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