Question

Which is the molar mass of H2O? 10.02 g/mol 16.00 g/mol 17.01 g/mol 18.02 g/mol

Answer 1

Molar mass:

Molar mass of any element is equal to the atomic mass of that element in the unit of grams. Molar mass is also equal to the mass of 6.02*10^23   atoms of that element.  

The water or H2O is formed from 2 mole of hydrogen and one one of oxygen

The molar mass of H = 1.008 g/ mole

The molar mass of O= 16.00g/ mole

Therefore the molar mass of water = 2* 1.008 g/ mole+16.00g/ mole

                                                    =18.02 / mole

Answer 2

Answer;

Molar mass of water is 18.02 g/mol

Explanation;

-Molar mass of a compound is determined by adding the relative atomic mass of each atom present in the compound. Molar mass of one mole of a compound, it is the weight in grams of  6.02 × 1023 atoms or molecules.

-Therefore; to calculate the molar mass of Water (H2O);  we first know the RAM of hydrogen and oxygen which are; H=1.01 and O= 16.00

Since there is two atom of hydrogen and one atom of oxygen in water;

Then; the Molar mass of water  will be; 2×1.01 + 1 ×16 = 18.02 g/mol