Question

How many HCl molecules and moles are there in 3.65 grams of

hydrogen chloride at normal conditions?

Answer 1

0.6022×10²³ molecules

Number of moles = 0.1 mol

Step-by-step explanation:

Given data:

Mass of HCl = 3.65 g

Number of molecules = ?

Number of moles = ?

Solution:

Number of moles:

Number of moles = mass/molar mass

Number of moles = 3.65 g/36.45 g/mol

Number of moles = 0.1 mol

Number of molecules:

1 mole of any substance contain 6.022×10²³ molecules

0.1 mol × 6.022×10²³ molecules/ 1 mol

0.6022×10²³ molecules