In the following reaction it was found that 880 grams of carbon dioxide is forme

Question

In the following reaction it was found that 880 grams of carbon dioxide is formed C_5H_22 + 8O_2 rightarrow 5CO_2 + 6H_2O Calculated how many grams of pentane C_5H_12 reacted. Calculated how many grams of water is formed. Calculated how many grams of oxygen gas O_2 reacted. In the following reaction 702 grams of aluminum carbonate was used to react with phosphoric acid. Al_2(CO_3)_3 + 2H_3PO_4 rightarrow 2AlPO_4 + 3CO_2 + 3H_2O Calculate how many grams of aluminum phosphate will be formed. Calculate how many grams of acid will react. Calculate how many grams of water will be formed. Calculate how many grams of carbon dioxide will be formed.

Explanation / Answer

9.

880 g of CO2

a) grams of pentane

mol of CO2 = mass/MW = 880/44 = 20 mol of CO2

ratio is 1:5 so

20/5 = 4 mol of pentane

mass = mol*MW = 4*72.15 = 288.6 g of pentane

b)

water

ratio is 5:6 so

5/6*20 = 16.6666 mol of H2O

mass = mol*mW = 16.6666*18 = 299.9988 g of water

c)

O2 has a ratio

5:8

so

5/8*20 = 12.5 mol of O2

mass = mol*MW = 12.5*32 = 400 g of O2

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