Formulae Equations CUSTOM

Question 1

Number of particles Equation

Answer 1

Number of Particles = Number of Moles x Avogadro Constant

Question 2

Moles Equation

Answer 2

Moles = Concentration x Volume
OR
Moles = Mass / Mr
OR
Moles = Mass / Molar Mass
OR

Moles = (molarity x volume in cm3) / 1000

Question 3

Density Equation

Answer 3

Density = Mass / Volume

Question 4

Molar Mass Equation

Answer 4

Molar Mass = Mass / Moles

Question 5

How can you derive the molarity equation?

Answer 5

moles = concentration x volume
= molarity x volume dm3
= (molarity x volume cm3) / 1000

The /1000 takes into account 1000cm3 in 1dm3.

Question 6

Atom economy Equation

Answer 6

Molecular Mass of Desired Product
———————————————————- X 100
Sum of molecular masses of all product

Question 7

Molar Gas Volume:

• At Room Temp
• At any standard temp and pressure

Answer 7

Room:
24 dm3mol-1

STP:
22.4 dm3mol-1

Question 8

What does pV = nRT mean

Answer 8

The ideal gas equation.

Pressure (Pa) X Volume (m3) = number of moles of gas X Gas Constant (8.31JKmol) X Temp (Kelvin)

Question 9

Kelvin To Celsius

Answer 9

K = C + 273

Question 10

How many cm3 in 1m3

Answer 10

10^6 cm3 in 1m3

Question 11

Volume of Gas at RTP

Answer 11

Vol = Mol x 24

Question 12

Volume of Gas at Standard Temp Pressure

Answer 12

Vol = Mol x