amount of substance

Question 1

define mole

Answer 1

amount of substance that contains 6.022 x 10 to power 23 particles

Question 2

define Avogadro constant

Answer 2

number of atoms in 12g of carbon12

Question 3

define concentration of a solution

Answer 3

how much solute is present in a known volume of solution

Question 4

what is the equation for number of moles in a solution

Answer 4

number of moles in a solution= (concentration x volume) / 1000

Question 5

what i the ideal gas equation

Answer 5

pressure (Pa) = volume (m3) x moles x gas constant (8.31 JK-1mol-1) x temperature (K)

Question 6

what is the value for the gas cosntant

Answer 6

8.31 JK-1mol-1

Question 7

define stoichiometry

Answer 7

when the ratio in which the reactants react an the products are produced in whole numbers

Question 8

define atom economy

Question 9

define atomy economy

Answer 9

in theory how many atoms must be wasted in a reaction

Question 10

define percentage yield

Answer 10

the practical efficiency of a process

how much is lost due to :
- the practical process of obtaining product
- result of reactions that don’t complete