chemical reactions

Question 1

What is the Law of Conservation of Mass ?

Answer 1

Any given chemical reaction, the total mass of reactants equals the total mass of the products

Question 2

A 20g sample of compound A is mixed with 45g of compound B. A chemical reaction occurs in which a gas is produced. Once the reaction is complete, the final mixture has been made. What is the mass of the gas ?

Answer 2

10g

Question 3

Syntesis

Answer 3

A reaction in which 2 reactants combine to make a product. A + B = AB or Zinc + Sulfur = Zinc Sulfide

Question 4

Decomposition

Answer 4

A reaction in which a reactant breaks down from 2 (or more) simpler products. AB = A + B or Water = Hydrogen + Oxygen

Question 5

Single displacement

Answer 5

A reaction in which an element displaces another element in a compound, producing a new compound and a new element. A + BC = AC + B or A + BC = AB + C

Question 6

Double displacement

Answer 6

a reaction that occurs when elements in different compounds displace each other or exchange places, producing two new compounds. AB + CD = AD + CB or Silver Nitrate + Sodium Chloride = Silver Chloride + Sodium Nitrate

Question 7

What is the difference between a complete combustion reaction and an incomplete combustion reaction?

Answer 7

If there is enough oxygen complete combustion can occur, but if there is not, carbon monoxide will be released instead causing incomplete combustion.