Bell metal contains 80% copper . The mass of Bell metal which contain 1.5 xx 10^(20) atoms of copper is (Cu = 64)

Bell metal contains 80% copper . The mass of Bell metal which contain

1.	Bell metal contains 80% copper . The mass of Bell metal which contain 1.5 xx 10^(20) atoms of copper is (Cu = 64)
Answer» 2 mg 20 mg 40 mg 12.8 mg ANSWER :B