___ Na(s) + ___ N_2(g) rightarrow ____ NaN_3 How many moles of sodium nitride ca

Question

___ Na(s) + ___ N_2(g) rightarrow ____ NaN_3 How many moles of sodium nitride can be made from 5.0 moles of sodium metal? 5.0 mol Na times mol NaN_2/mol Na = mol NaN_3 How many moles of nitrogen are needed for this reaction? 5.0 mol Na times mol N_2/mol Na = mol N_2 ____C_2H_4O_2 + ___O_2 rightarrow CO_2 + ____ H_2O How many moles of carbon dioxide can be made from 10.0 moles of oxygen? How many moles of C_2H_4O_2 (acetic acid) are needed for this reaction? ____ V_2O_5 + _____ CaO + ____ V_2S_5 How many moles of calcium oxide can be obtained from 0.35 moles of vanadium(V) oxide? How many moles of sulfur are needed for this recation? ____ S_8 + ____ O_2 rightarrow ____ SO_2 How many moles of sulfur dioxide can be made from 1.0 miles of sulfur? How many moles of oxygen are needed for this reaction? ____ H_2O_2 rightarrow ____ O_2 + ____ H_2O How many moles of hydrogen peroxide (H_2O_2) are needed to make 4.5 moles of oxygen? How many moles of water are also made?

Explanation / Answer

Ans:1.

Step 1: Balance the equation

2Na + 3N2 -- 2NaN3

Step 2: Finding the Stochiometric coefficeints:

Given x mol ratio = mol Need

5.0 mol of Na x 2 mol of NaN3/ 2 mol of Na = 5.0 mol of NaN3

5.0 mol of Na x 3 mol of N2/ 2 mol of Na = 5 x 3/2 = 7.5 mol N2

Ans: 2

C2H4O2 + 2O2 = 2CO2 + 2H2O

Ans: 3

V2O5 + 5CaS = 5CaO + V2S5

Ans:4

S8 + 8O2 = 8SO2

Ans:5

2H2O22H2O+O2

Please Note:

1. All equations are now balanced.

2. Now take the Given mol x mol ratio(from balanced reaction) = mol need

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