Gas Law Stoichiometry

Front

What volume of hydrogen will be produced at STP by the reaction 67.3 g of magnesium with excess water according to the following reaction?
1Mg + 2H₂O --> Mg(OH)₂ + H₂
Options: 62L, 65L, 31L, 124L

Back

62L

Front

How do I move from grams to moles?

Back

Divide by molar mass

Front

How do I change from moles to liters?

Back

multiply by 22.4

Front

How many atoms are in a mole?

Back

6.022x10^23

Front

How many liters are in a mole?

Back

22.4

Front

How many grams are in a mole?

Back

Molar Mass

Front

Mg₃N_2(s) + 3H₂O_(l) ––> 3 MgO + 2NH_3(g)
If 10.3 g of magnesium nitride is used, what volume of ammonia gas would be collected at 20˚C and 0.989 atm?

Back

4.96 L H₂

Front

In the ideal gas law, _____ represents moles of a gas.

Back

n

Front

Molar mass of Mg(NO₃)₂

Back

148.313g/mol

Front

What is standard temperature?

Back

0^oC