Answer to Question #264202 in Chemistry for Andrew

Question

10 L of o2to gas to molecules

Answer 1

At STP, 1 mole of gas occupies 22.4 l.

n (O₂) = 10 / 22.4 = 0.45 mol

A mole (mol) is the amount of a substance that contains 6.02 × 10 ²³ representative particles of that substance.

N (O₂) = 0.45 x 6.02 × 10 ²³ = 2.69 x 10 ²³ molecules.