IGCSE Chemistry, Trimester 3 Unit 3 - Week 2 - STOICH

Calcium fluoride and lithium carbonate react to produce calcium carbonate and another salt. How many grams of the other salt will be produced if you start with 156 g of calcium fluoride and an excess of lithium carbonate.
Ammonium sulfate is produced from the synthesis of ammonia and sulfuric acid (H2SO4). What mass of EACH reactant will you need to form 5 moles of ammonium sulfate?
What mass of cesium will be needed to displace all of the gallium from 7 moles of gallium chloride?
What mass of oxygen will be used if a 120 g tank of butane (tetracarbon decahydrate) is fully combusted.

**include picture of all calculations as attachment**