Chemistry c3 science revision OCR

How do you calculate the amount of moles in an element?

The atomic number is the same amount of moles in an element.
How much does a mole of hydrogen gas (H₂)weigh?
- (atomic number)
- 2g
How much does a mole of oxygen gas (O₂) weigh?
- (Atomic number)
- 16g
What is Avogadro's number?

6.022 x 10²³
How to calculate moles?
- (Mr moles with a mass on his head)
- Moles = Mass/Mr
What is a exothermic reaction?

The reaction looses energy and heat.
What is a endothermic reaction?

The reactions gains energy and heat.
What does (aq) stand for on a element?

Aqueous solution.
What does (S), (l) and (g) stand for?
- Solid
- Liquid
- Gas

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Chemistry c3 science revision OCR

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Revision for chemistry C3 OCR

Updated

2017-05-11T13:54:38Z

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