mol, conc., reacting masses

Question 1

avogadro constant (L)

Answer 1

number of atoms, molecules, ions or other chemical entities in one mole of a substance 6.02 x 10^23

Question 2

mole

Answer 2

6.02 x10^23 chemical entities . mass number is the weight of 6.02 x10^23 (1mole)

Question 3

how to calculate number of moles

Answer 3

mass / Mr

Question 4

how to calculate the mass

Answer 4

mol x Mr

Question 5

how to calculate the Mr

Answer 5

mass / mol

Question 6

Mr of CO2

Answer 6

44

Question 7

units for molar mass/formula mass

Answer 7

g mol ^ -1

Question 8

how do you calculate the number of particles

Answer 8

no. of mols x avogadro’s constant

Question 9

molar concentration

Answer 9

number of molecules of a solution per litre of solution (mol dm^-3)

Question 10

molarity (M)

Answer 10

the molarity of a solution is the same as its molar concentration

Question 11

dm^3 conversions

Answer 11

1 dm^3 = 1000 cm^3
1m^3 = 1000dm^3

Question 12

how to calculate concentration

Answer 12

conc. = mol / vol

Question 13

how to calculate mols using conc + vol

Answer 13

conc x vol

Question 14

how to calculate volume

Answer 14

mol / conc

Question 15

stoichiometry

Answer 15

ratio in which reactants react and products are produced in whole numbers e.g 2H2 + O” -> 2H2O ration of H2 + O2 would be 2:1

Question 16

law of conservation of mass

Answer 16

mass cannot be created or destroyed

Question 17

coefficients

Answer 17

big numbers, tell us the ratio in which things react (mols)

Question 18

limiting reactants

Answer 18

reactants that restrict the amount of product that a reaction can produce