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Determining the complete combustion

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If sodium peroxide is added to water, elemental oxygen gas is generated:

Na2O2(s) + H2O(l) → NaOH(aq) + O2(g)

Suppose 1.80 g of sodium peroxide is added to a large excess of water. What mass of oxygen gas will be produced?

___g

2) When small quantities of elemental hydrogen gas are needed for laboratory work, the hydrogen is often generated by chemical reaction of a metal with acid. For example, zinc reacts with hydrochloric acid, releasing gaseous elemental hydrogen:

Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)

What mass of hydrogen gas is produced when 1.80 g of zinc is reacted with excess aqueous hydrochloric acid?

__g

3) The gaseous hydrocarbon acetylene, C2H2, is used in welders' torches because of the large amount of heat released when acetylene burns with oxygen.

2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(g)

How many grams of oxygen gas are needed for the complete combustion of 1.1×102 g of acetylene?

___g

Reference no: EM131061445

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