Need chemistry help with Reaction Stoichiometry

According to the reaction below, how many grams of lithium oxide could be produced from 4.5 moles LiCl?

4 LiCl  + O2  → 2 Li2O  + 2 Cl2

According to the reaction below, how many moles of lithium nitride could be produced from 39.4 grams lithium?  Express your answer with proper significant figures.

6 Li  +  N2  →  2 Li3N

According to the reaction below, how many grams of hydrogen would be produced by reaction of 30.7 grams sulfur?

6 HF  + S  → SF6  + 3 H2

According to the reaction below, What mass of oxygen is needed to react 23.7 g phosphorus?

5 O2  + 4 P  → P4O10

According to the reaction below, how many grams of hydrogen would be produced by reaction of 6.1 x 1023 atoms of sulfur?

4 HF  + S  → SF4  + 2 H2

According to the reaction below, how many moles of hydrogen would be produced by reaction of 6.0 x 1023 molecules HF?

10 HF  + 2 P  → 2 PF5  + 5 H2

According to the reaction below, how many grams of hydrogen would be produced by reaction of 9.0 x 1023 molecules HF?

4 HF  + S  → SF4  + 2 H2

If 33 g lithium is reacted with excess nitrogen, what is the theoretical yield of Li3N, in grams.

6 Li  +  N2  →  2 Li3N

45.0 g fluorine are reacted with excess C2H6, and 1.47 g hydrogen are formed. Calculate the percent yield of hydrogen.

4 F2  + C2H  → 2 CF4  + 3 H2

 
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