Relative Formula Mass

Test yourself on Relative Formula Mass

• In the equation Mr = ΣAr, what does the symbol Σ tell you to do?

• A compound's formula contains two atoms of oxygen. How many times should oxygen's relative atomic mass be added when working out the compound's relative formula mass?

• Relative molecular mass is another name for relative formula mass. What is relative molecular mass equal to for a molecule?

• In the equation Mr = ΣAr, what does the symbol Σ tell you to do with the relative atomic masses?

• Relative molecular mass is another name for relative formula mass. For a given compound, how do the two values compare?