1) What is the name given to the number 6.02 x1023 particles? a) The mole b) A lot c) Rutherford's Number d) Heisenberg's Number 2) What is the law of conservation of mass? a) The mass in a chemical reaction changes from reactants to products b) Mass always goes up in a chemical reaction c) Mass always goes down in a chemical reaction d) No atoms are gained or lost during a chemical reaction. 3) What is the symbol for relative atomic mass? a) Mr b) Ar c) At R d) Rel Atm 4) Which element are the masses of all other elements compared to as 'the standard'? a) Carbon-12 b) Oxygen-16 c) Hydrogen-1 d) Gold-197 5) What is the symbol for formula mass? a) Ar b) Form Mass c) Mf d) Mr 6) How is the formula mass of a compound calculated? a) The atomic masses of each element in the compound are added together. b) Atomic masses are multiplied together. c) Atomic masses are added and divided by how many atoms there are. d) Atomic masses are added and then multiplied by Avogadro's number. 7) What is the formula mass of calcium carbonate, CaCO3? a) 96 b) 100 c) 78 d) 110 8) If the total Mr of all the reactants in a chemical reaction is 420, what is the total Mr of all the products? a) 210 b) 840 c) 10 d) 420 9) If I have 40g of NaOH, how many moles do I have? a) 40 b) 1 c) 17 d) 400 10) How many atoms are there in CuCO3? a) 5 b) 3 c) 4 d) 6 11) How many different elements are there in CuCO3? a) 5 b) 3 c) 4 d) 6 12) What term is used to describe a reactant that you have more than you need of? a) In excess b) Loads of it c) Major reactant d) Reactant A 13) What term is used to describe a reactant that you have too little of to react with all of the other reactants? a) Shortage reactant b) Not much of it c) Reactant B d) Limiting reactant 14) What is the formula that links moles, mass and formula mass? a) n = m/Mr b) n = Mr x m c) n = Mr/m d) n = Mr / 6.02x1023

Quantitative Chemistry: Moles

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