Use the equation

2Cu+O2-->2CuO

to find how many grams of copper react to produce 7.00 mol CuO.

Question options:

286

426

445

413

The number of grams of copper reacted is 445 grams

calculation

2Cu + O₂ → 2CuO

from equation above the mole ratio of Cu:CUO is 2:2 = 1:1, therefore the moles of Cu is also = 7.00 moles

mass=moles x molar mass

from periodic table the molar mass of Cu = 63.5 g/mol

mass = 7.00 moles x 63.5 g/mol = 445 grams