A sample of ammonia has a mass of 43.5 g.How many molecules are in this sample?

Name: A sample of ammonia has a mass of 43.5 g.How many molecules are in this sample?
Brand: Quizplus
Rating: 4.8 (57 reviews)

Question

Quizplus · Accepted Answer

To find the number of molecules, first calculate the number of moles of ammonia (NH₃) using its molar mass (17.03 g/mol). Then multiply by Avogadro's number (6.022 x 10²³ molecules/mol). 43.5 g / 17.03 g/mol = 2.55 moles. 2.55 moles x 6.022 x 10²³ molecules/mol = 1.54 x 10²⁴ molecules.

A Sample of Ammonia Has a Mass of 43 ×\times× 1025 Molecules C)2

A Sample of Ammonia Has a Mass of 43 $\times$ 10²⁵ Molecules
C)2