What is the mass of platinum that has 4.34x10^21 of atoms?

Question

Catherine Logan

Chemistry

28 September, 18:05

What is the mass of platinum that has 4.34x10^21 of atoms?

+2

Answers (1)

Know the Answer?

Haley Cline · Answer 1

Answer is: the mass of platinum is 1.405 grams.

N (Pt) = 4,34·10²¹.

n (Pt) = N (Pt) : Na.

n (Pt) = 4,34·10²¹ : 6,022·10²³ 1/mol.

n (Pt) = 0,0072 mol.

m (Pt) = n (Pt) · M (Pt).

m (Pt) = 0,0072 mol · 195 g/mol.

m (Pt) = 1,405 g.

n - amount of substance.

Na - Avogadro number.