Question

the mass of 1.5 into 10^20 atoms of an element in 15mg. the atomic mass of the element is

Answer 1

Answer:

60 amu

Explanation:

given, mass of 1.5×10^20atoms weight 15 mg

=15÷1000 kg

we know that one mole is =6.023×10^23 particals

let, the weight of 6.023×10^23 particals is =X

1.5×10^20 = 15÷1000

6×10^23 = X

(1.5×10^20) X = 15×6×10^20

both sides 10^20 cancelled

then X= (15×6)÷ 1.5

X = 60 amu ( amu - atomic mass unit)

I hope it helps you