Chapter 3 Amount Of Substance

Question 1

What is the avogadro constant

Answer 1

6.02 x 10²³ mol⁻¹

Question 2

What is the equation of a mole

Answer 2

n=m/M

Question 3

What is the molar mass equal to

Answer 3

The relative atomic mass for a substance

Question 4

How many kg are in a tonne

Answer 4

1000

Question 5

What is an empirical formula

Answer 5

The simplest whole-number ratio of atoms of each element in a compound

Question 6

What is the molecular formula

Answer 6

The actual number of atoms of each element in compound

Question 7

What is the relative molecular mass

Answer 7

compares the mass of a molecule with 1/12th of the mass of an atom of carbon-12

Question 8

What is the relative formula mass

Answer 8

compares the mass of a formula unit with 1/12th of the mass of an atom of carbon-12

Question 9

What is a hydrated salt

Answer 9

Ionic solid containing water molecules

Question 10

What is an Anhydrous salt

Answer 10

Ionic solid containing no water molecules

Question 11

What is the equation for concentration

Answer 11

n/v

Question 12

What is a standard solution

Answer 12

A solution of known mass

Question 13

What is the ideal gas equation and what are the units

Answer 13

pV=nRT

p=Pa
V=m³
T=K

Question 14

What is the equation for %Yield

Answer 14

Actual/Theoretical x100

Question 15

What is the equation for % Atom Economy

Answer 15

(Σ molar masses of desired products) / (Σ molar masses of all products)
x100