Answer to Question #109057 in General Chemistry for Jamie Strong

Question

How many moles of oxygen are produced when 756 grams of lead 11 oxide are formed

Find the mass of nitrogen dioxide that forms with 0.58 moles of oxygen

Answer 1

1) 2 Pb + O2 = 2 PbO

the amount of PbO is 756 g / 223.2 g/mole = 3.38 mole, it is twice of moles of O2, i.e.

the amount of oxygen is 3.38/2 = 1.69 moles

2) N2 + 2 O2 = 2 NO2

0.58 moles of oxygen correspond to 0.58 moles of nitrogen dioxide,

the mass of nitrogen dioxide is 0.58 mole * 46 g/mole = 26.68 g