Intro to the Mole and Molar Mass

Avogadro's number of particles in a mole holds true for:

• Ions

• Molecules

• Atoms

• All of these

Tags

NGSS.HS-PS1-7

One mole of hydrogen atoms has the same mass as Avogadro's number of hydrogen atoms.

• TRUE

• FALSE

Avogadro's number is defined as the number of atoms present in one mole of the element or the number of molecules present in one mole of the substance.

• TRUE

• FALSE

What is the molar mass of NaCl?

• 49.46 g/mol

• 58.44 g/mol

• 152.92 g/mol

• 161.90 g/mol

What is the molar mass of MgF₂?

• 62.31 g/mol

• 67.62 g/mol

• 43.31 g/mol

• 86.62 g/mol

Tags

NGSS.HS-PS1-7

What is the molar mass of Li₂O?

• 22.94 g/mol

• 29.88 g/mol

• 45.88 g/mol

• 38.94 g/mol

Tags

NGSS.HS-PS1-7

What is the molar mass of Al₂O₃?

• 42.98 g/mol

• 69.96 g/mol

• 85.96 g/mol

• 101.96 g/mol

What is the molar mass of Al(NO₃)₃?

• 62.01 g/mol

• 88.99 g/mol

• 151.00 g/mol

• 213.01 g/mol

What is the molar mass of SrS?

• 87.62 g/mol

• 119.69 g/mol

• 151.76 g/mol

• 32.07 g/mol

What is the molar mass of CuBr₂?

• 145.23 g/mol

• 122.54 g/mol

• 223.35 g/mol

• 213.54 g/mol