Which has the greater mass, 1.204 × molecules of molecular hydrogen, , or 1.204 × molecules of water, O?
A)1.204 × molecules of molecular hydrogen has a greater mass than 1.204 × molecules of water
B)1.204 × molecules of water has a greater mass than 1.204 × molecules of molecular hydrogen.
C)The mass of this many molecules of water and molecules are molecular hydrogen are the same.
D)Not enough information is provided.

Question

Which has the greater mass, 1.204 ×  molecules of molecular hydrogen,  , or 1.204 ×  molecules of water,  O?
A)1.204 × molecules of molecular hydrogen has a greater mass than 1.204 × molecules of water 
B)1.204 × molecules of water has a greater mass than 1.204 × molecules of molecular hydrogen. 
C)The mass of this many molecules of water and molecules are molecular hydrogen are the same. 
D)Not enough information is provided.

Quizplus · Accepted Answer

To compare the masses of different molecules, we need to consider their molar masses. The molar mass of molecular hydrogen (H2) is 2 g/mol, and the molar mass of water (H2O) is 18 g/mol. Therefore, 1.204 × 10^23 molecules of H2 have a mass of:
1.204 × 10^23 molecules × 2 g/mol = 2.408 × 10^23 g/mol
And 1.204 × 10^23 molecules of H2O have a mass of:
1.204 × 10^23 molecules × 18 g/mol = 2.1672 × 10^24 g/mol
Since 2.1672 × 10^24 g/mol is greater than 2.408 × 10^23 g/mol, 1.204 × 10^23 molecules of water have a greater mass than 1.204 × 10^23 molecules of molecular hydrogen. Therefore, the correct answer is B.

Which Has the Greater Mass, 1