Question

State the number of moles in 4kg of CuO.

A) 0.125 moles
B) 1 mole
C) 2 moles
D) 4 moles

Answer 1

The number of moles in 4kg of CuO is approximately 50.27 moles.

Step-by-step explanation:

The number of moles in 4kg of CuO can be determined by using the molar mass of CuO. The molar mass of CuO is 63.55 g/mol for copper and 16.00 g/mol for oxygen. So, the molar mass of CuO is 63.55 + 16.00 = 79.55 g/mol. To convert 4kg to grams, we multiply by 1000 to get 4000 grams. Now we can use the molar mass to calculate the number of moles:

Number of moles = Mass of CuO / Molar mass of CuO

Number of moles = 4000 g / 79.55 g/mol

Number of moles = 50.27 moles

Therefore, the number of moles in 4kg of CuO is approximately 50.27 moles.