Question

Calculate number of molecules in 44 g of NO2 gas ​

Answer 1

Given - Mass of NO2 = 44 gram

Find - Number of molecules

Solution - Number of molecules in 44 gram of nitrogen dioxide gas is 5.7*10²³.

Firstly finding the number of moles of 44 grams of nitrogen dioxide gas.

Number of moles = mass/molar mass

Molar mass of nitrogen is 46 gram/mole.

Number of moles = 44/46

Number of moles = 0.95

1 mole has number of molecules equal to Avogadro's number which is 6.02*10²³.

0.95 mole will have number of molecules = 5.7*10²³.

Thus, number of molecules in 44 gram of nitrogen dioxide gas is 5.7*10²³.