Answer:
everything (matter) is made up of molecules(atoms)
Explanation:
Answer:
Mass H2O = 9.01 grams
Mass He = 8.0 grams
The mass per mol of water is more than the mass per mol of helium.
Explanation:
Step 1: Data given
Molar mass water = 18.02 g/mol
Molar mass of helium = 4.0 g/mol
Number of moles H2O = 0.5 moles
Number of moles He = 2.0 moles
Step 2: Calculate mass
Mass = moles * molar mass
Mass H2O = 0.5 moles * 18.02 g/mol
Mass H2O = 9.01 grams
Mass He = 2.0 moles * 4.0 g/mol
Mass He = 8.0 grams
The mass per mol of water is more than the mass per mol of helium.
