# Chemistry 4.3 - Quantitative Chemistry

• Created by: MaxR1
• Created on: 19-05-18 15:11
What is the conservation of mass?
The idea that in a chemical reaction, the total mass of products = total mass of reactants, as no atoms are lost or made.
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What is relative formula mass?
The sum of the relative atomic masses of all the atoms in the numbers shown in the formula.
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What is the relative formula mass of Carbon Dioxide?
Carbon = (12 x 1) Oxygen x 2 = (16 x 2) (12 x 1) + (16 x 2) = 44
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Why must a symbol equation balance?
As no atoms are lost or made in a reaction
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How many particles are in a mole?
6.02 x 10^23
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How many grams in 1 mole of sodium?
The relative atomic mass of Sodium is 23. Therefore 23g
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What is the equation for moles?
Mass of substance = Atomic mass x Moles (Mass = Mr x Moles)
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Calculate the mass of aluminium oxide needed to make 540g of Aluminium
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What is a limiting reactant?
Sometimes when 2 chemicals react together, one chemical is completely used up, and stops the reaction from going any further
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## Other cards in this set

### Card 2

#### Front

What is relative formula mass?

#### Back

The sum of the relative atomic masses of all the atoms in the numbers shown in the formula.

### Card 3

#### Front

What is the relative formula mass of Carbon Dioxide?

### Card 4

#### Front

Why must a symbol equation balance?

### Card 5

#### Front

How many particles are in a mole?