How many methane molecules of Ch4 have a mass equal to 3.20 grams?

Answer 1

One mole is equal to 6.022 x 1023 of anything. In this case, we are looking for molecules. So 1 mole=6.022 x 1023 molecules. We have 2.3 moles, so we want to know how many molecules are there.

2.3 mol CH4 x 6.022x1023 molecules CH4 / mol CH4 = 1.38x1024 molecules of CH4

Answer 2

To convert moles to grams, use the molar mass of methane. Methane has a molar mass of 16 (1 carbon weighs 12 grams per mole and 4 hydrogens each weigh 1 g/mol). Then multiply the two numbers together: 23.1 mol CH4 * 16 g/mol = 369.6 g CH4.

Answer 3

A mole of any substance is given by Avogadro's number, and is 6.0221415 × 1023 molecules per mole. Therefore, 2.43 x 10^23 molecules is .404 moles of methane.

Answer 4

First divide value by avagadro constant.(6.022x10623)Then multiply answer by molar mass

Answer 5

3.01*10^23