S3 Formula and the Mole

The compound called sodium hydroxide contains the elements: sodium, hydrogen and ___________ .

The symbol for the element potassium is _____

The valency for the group ion sulfate is _________

The prefix tri means _________

The formula for silicon dioxide is _______

The correct formula for the compound aluminium phosphate is

• Al₃(PO₄)₃

• Al₃PO₄₃

• AlPO₄

• Al(PO₄)

Calculate the formula mass of iron (III) oxide, Fe₂O₃. The answer is _____ amu.

The gram formula mass is the mass of _____ mol

Calculate the mass of 4 mol of water, H₂O. The final answer is ______ g

Calculate the concentration of a 500 cm³ solution containing 2 mol of solute. The final answer is _______ mol l^-1