How would one distinguish between the subatomic particles that make up an atom

What is the mass of oxygen gas is consumed in a reaction that produces 4.60mol so2

Which aqueous solution of ki freezes at the lowest temperature? 1) 1 mol of ki in 500. g of water 2) 2 mol of ki in 500. g of water 3) 1 mol of ki in 1000. g of water 4) 2 mol of ki in 1000. g of water

Which of the following will cause an increase in the acceleration of an object? increase force decrease force increase mass decrease mass