1) What is the conservation of mass? a) Atoms can be created or destroyed b) Energy cannot be created or destroyed c) Matter can be created or destroyed d) Atoms cannot be created or destroyed  2) When a metal forms a metal oxide, why does the mass increase? a) Because oxygen atoms have been added b) Because oxygen atoms have been removed c) Because the metal atoms have changed into a different element d) Because the metal has evaporated 3) When an acid reacts with a metal, why does the mass decrease? a) Because a gas is produced and escapes b) Because the metal atoms combine to form a solid c) Because the acid has evaporated d) Atoms can be created or destroyed e) Energy cannot be created or destroyed f) Matter can be created or destroyed 4) What is relative formula mass? a) The sum of the relative masses of each atom in a compound b) The mass of a compound in grams c) The mass of a single atom d) The sum of the atomic numbers of each atom in a compound 5) What are the four state symbols and what do they stand for? a) (s) solution, (l) liquid, (g) gel, (aq) aqueous b) (s) solid, (l) light, (g) gas, (aq) aqueous c) (s) solid, (l) liquid, (g) gas, (aq) acid d) (s) solid, (l) liquid, (g) gas, (aq) aqueous 6) What symbol do we use for relative formula mass? a) Mw b) Mf c) Rf d) Mr 7) What is a mole? a) A small animal b) A unit of mass c) A number of particles d) A chemical reaction 8) What is Avogadro's number? a) 6.022x10^23 b) 3.14159 c) 9.8 m/s^2 d) 2.71828 9) What formula relates moles, mass and Mr? a) Moles = mass x Mr b) Moles = mass - Mr c) Moles = mass/Mr d) Moles = mass + Mr 10) What is a limiting rectant? a) A reactant that does not have enough mass to react with all the product b) A reactant that reacts completely and is fully consumed c) A reactant that is added in excess to ensure complete reaction d) A reactant that is highly reactive and drives the reaction forward 11) What is the unit for concentration? (Double only) a) g/L b) g/dm^3 c) mol/m^3 d) kg/m^3 12) Which formula relates concentration, mass and volume? a) concentration = mass x volume b) concentration = mass - volume c) concentration = mass + volume d) concentration = mass/volume 13) If the amount of solute in a solution is increased, what happens to its concentration? a) Stays the same b) Decreases c) Increases d) Becomes zero 14) If the volume of water in a solution is increased, what happens to its concentration? a) Stays the same b) Decreases c) Increases d) Becomes zero 15) What is the yield of a chemical reaction? a) The amount of starting material used b) The amount of energy released c) The amount of useful product d) The amount of waste produced 16) What is the theoretical yield of a chemical reaction? a) The yield obtained in a laboratory setting b) The yield observed in industrial-scale reactions c) The yield calculated based on experimental data d) The yield which you would expect to get in a reaction 17) What is the percentage yield of a chemical reaction? a) The amount of excess reactant used b) The amount of actual product obtained c) The amount of theoretical product calculated d) The amount of actual product divided by the theoretical yield 18) Why is the % yield almost never 100%? a) Irreversible reaction b) No loss of product during separation c) No unexpected side reactions d) Reversible reaction, loss of product on separation, unexpected side reactions 19) What is atom economy? a) The number of atoms involved in a reaction b) The efficiency of a reaction in utilizing atoms c) The amount of starting material that ends up as useful product d) The total mass of atoms in a reaction 20) Why is atom economy important? a) Safety considerations in reactions b) Ease of reaction monitoring c) Economic and sustainability reasons d) Regulatory requirements 21) How is atom economy calculate? a) 100 x (Mr desired product)/(Mr of all reactants) b) 100 x (mass of desired product)/(mass of all reactants) c) 100 x (moles of desired product)/(moles of all reactants) d) 100 x (Mr of desired product)/(Mr of all reactants) 22) What are the two units for concentration? a) g/cm^3 and mol/dm^3 b) g/L and mol/cm^3 c) g/dm^3 and mol/cm^3 d) g/dm^3 and mol/dm^3 23) Which formula relates concentration, moles and volume? a) concentration = moles x volume b) concentration = moles - volume c) concentration = moles + volume d) concentration = moles/volume 24) What is the purpose of titration? a) To determine the color change of a solution b) To establish the boiling point of a substance c) To establish the concentration of an unknown solution d) To determine the pH of a solution 25) Why are burettes used for some measurements and pipettes for others? a) Burettes measure a fixed volume, pipettes measure a variable volume b) Burettes are more accurate than pipettes c) Burettes are used for liquids, pipettes for gases d) Pipettes measure a fixed volume, burettes measure a variable volume  26) What do the moles of gases and their volumes have in common? a) They have a direct linear relationship b) They have an inverse relationship c) At the same temperature, they occupy the same amount of volume d) They are unrelated quantities 27) What is the volume of one mole of any gas at room temperature and pressure? a) 1 cm^3 b) 10 cm^3 c) 22.4 dm^3 d) 100 dm^3

FULL Separate Quantitative

by
Print
Embed

Leaderboard

Visual style

Options

Switch template

Continue editing: ?