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**

One does not belong why? ice, gold ,wood ,diamond and table salt

The last few miles of the marathon are the most difficult for heather, her hair plastered to her head, sweat clinging to her arms, and her legs already feeling as if they had nothing left, just dead weight. after grabbing a cup of ice water, she feels the ice cubes smash against her nose as she gulps some cool refreshment and keeps on running. in these last few miles, the breeze kicks up and she finally feels some coolness against her skin. drips of sweat, once clinging to her forehead, now spill down, and heather feels more pain as the sweat flows into her eyes.which of the following is the most likely reason why the ice struck heather’s nose when she took a drink? a) water can function as a solvent. b) water can store large amounts of heat. c) water can moderate temperatures through evaporative cooling. d) the density of water decreases when it freezes. e) water has a cohesive nature.sweat remained on heather’s forehead and arms because of the a) high salt content of sweat b) cohesive nature of water c) ability of water to moderate heat d) high evaporative cooling effect of water e) ability of water to act as a solvent

The polymer used for the nonstick surface of cooking utensils is 24.0%c and 76%f by mass. what is the empirical formula of this polymer?