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CO2 has more than twice the mass of H2O. One Hydrogen atom weighs around 1 unit, while an oxygen atom is around 16 so a Water molecule is around 18 units. Carbon has around 12 units of mass. When you add the two Oxygen Molecules you get 44 units of mass for each CO2 molecule.

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16y ago
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13y ago

Water - H2O

Carbon Dioxide - CO2

1 Hydrogen atom = 1g; 1 Oxygen atom = 16g; 1 Carbon atom = 12g; SO:

water = (1x2) + 16 = 18g

carbon dioxide = 12 + (16x2) = 44g

So a carbon dioxide molecule is heavier than a water molecule.

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6mo ago

CO2 has more mass than H2O. The molecular weight of CO2 is 44.01 g/mol, while the molecular weight of H2O is 18.02 g/mol.

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15y ago

Carbon dioxide as it contains two oxygen atoms and a carbon. Where as an oxygen molecule consists of two oxygens only

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13y ago

Hydrogen has a molecular mass of 1 where as an oxygen atom has a molecular mass of 16 so oxygen is heavier than hydrogen

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12y ago

H2O has the smallest molar mass

its smaller that CO and H2O2

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16y ago

h20

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Q: Which molecule has more mass H2O or CO2?
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