What mass in kilograms does 4.41 moles of copper have?

0.280 kg

Explanation:

m = n * MM

where

m is mass in grams

n is moles &

MM is molecular mass

The molecular mass of copper can be found on the periodic table and is 63.546.

We now have all the required information to perform the calculation

m = 4.41 * 63.546

m = 280.23786

m = 280 g

In order to convert this value to kilograms, divide by 1000

280 / 1000

= 0.280 kg