Answer to Question #24193 in Inorganic Chemistry for Brandon

Question

How many grams of HgO must react to produce 3.75 moles of O2?

Answer 1

2HgO = 2Hg + O₂

According to the chemical equation the amount of HgO is double of O₂ produced.

n(HgO) = 2n(O₂) = 2 x 3.75 = 7.50 moles

Molar weight of HgO = 200.59 + 16.00 = 216.59 (g/mol)
Molar weights of atoms Hg and O were taken from the periodic table of elements.

The mass of HgO needed = amount of HgO (moles) x molar weight (g/mol)

m = 7.50 moles x 216.59 (g/moles) = 1624.42 g

Answer:

m(HgO) = 1624.42 g