Chapter 3- Amount Of Substance

Question 1

What is avogadros constant?

Answer 1

6.02*10^23 mol -1

Question 2

Give the equation for molar mass (M)

Answer 2

n= m/M

Question 3

What is water of crystallisation?

Answer 3

When water molecules are part of a colorized crystals crystalline structure- it is therefore hydrated

Question 4

How many cm^3 in one dm^3

Answer 4

1000cm^3 in 1 dm^3

Question 5

How many ml in 1000cm^3?

Answer 5

1000 ml

Question 6

How many litres in 1000ml?

Answer 6

1 L in 1000 ml

Question 7

What is a standard solution?

Answer 7

A solution of known concentration

Question 8

Define concentration

Answer 8

The amount of solute dissolved in a solvent

Question 9

Give the equation for finding the molar gas volume

Answer 9

n= v/Vm

Question 10

Give the ideal gas equation

Answer 10

Pv = nRT

Question 11

What is R in the ideal gas equation?

Answer 11

The ideal gas constant = 8.31Jmol -1 K -1

Question 12

What is V in the ideal gas equation measured in?

Answer 12

m^3

Question 13

What is the limiting reagent?

Answer 13

The reactant that is NOT in excess will be completely used up first and stop the reaction

Question 14

Give the equation for atom econ.

Answer 14

Sum of molar mass of DESIRED products / sum of molar mass of ALL products