Molecules to Mass

Molecular mass is defined as the:

• Mass of one molecule of any substance compared with the mass of one atom of C – 12

• Mass of one atom compared with the mass of one atom of hydrogen

• Mass of one atom compared with the mass of one molecule

• none of these

Tags

NGSS.HS-PS1-7

What is the molecular mass of water (H2O)?

• 18 g/mol

• 16 g/mol

• 14 g/mol

• 20 g/mol

Which of the following is Avogadro's number?

• 6.022 x 10^23

• 3.14

• 9.81

• 1.6 x 10^-19

What is the mass of one mole of carbon atoms?

• 12 g

• 6 g

• 24 g

• 18 g

Which of the following represents the formula for calculating molar mass?

• Molar mass = mass/number of moles

• Molar mass = number of moles/mass

• Molar mass = volume/number of moles

• Molar mass = number of moles/volume

What is the unit of molar mass?

• g/mol

• kg

• mol

• L

Tags

NGSS.HS-PS1-7

How many molecules are there in one mole of a substance?

• 6.022 x 10^23

• 1 x 10^23

• 3.14 x 10^23

• 9.81 x 10^23

Which of the following is the correct formula for calculating the number of moles?

• Number of moles = mass/molar mass

• Number of moles = molar mass/mass

• Number of moles = volume/molar mass

• Number of moles = molar mass/volume

Tags

NGSS.HS-PS1-7

What is the molecular mass of carbon dioxide (CO2)?

• 44 g/mol

• 32 g/mol

• 28 g/mol

• 40 g/mol

Which of the following is a diatomic molecule?

• O2

• H2O

• CO2

• CH4

Tags

NGSS.MS-PS1-1