Quantitative Aspects Of Chemical Change

Question 1

The mole

Answer 1

The amount of substance having the same number of particles as there are atoms in 12g of carbon-12

Question 2

Molar mass

Answer 2

The mass of one mole of a substance

Question 3

Avogadro’s number

Answer 3

The number of particles present in one mole

Question 4

Avogadro’s law

Answer 4

One mole of any gas occupies the same volume at the same temperature and pressure

Question 5

Concentration

Answer 5

The amount of solute per litre of solution

Question 6

Empirical formula

Answer 6

The simplest integral /whole number ratio in which different elements are combined

Question 7

Theoretical yield

Answer 7

The amount of product we would expect to form as the results of doing calculations

Question 8

Actual yield

Answer 8

The amount of product formed we actually do the experiment

Question 9

Limiting reagent

Answer 9

A substance that is used up first in the chemical reaction

Question 10

Percentage yield

Answer 10

The amount of product formed in the chemical reaction

Question 11

STP

Answer 11

Standard temperature and pressure