3.4 Equations And Calculations Flashcards Preview

GCSE Chemistry 2.3 How Much? > 3.4 Equations And Calculations > Flashcards

Flashcards in 3.4 Equations And Calculations Deck (5)
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1
Q

What does 2Mg + O2 –> 2MgO tell us in regards to moles?

A

2 moles of magnesium atoms react with 1 mile of oxygen molecules to produce 2 moles of magnesium oxide

2
Q

What does 2Mg + O2 –> 2MgO tell us in regards to atoms?

A

That 2 atoms of magnesium react with 1 molecule of oxygen to form 2 magnesium ions and 2 oxide ions

3
Q

What does 2Mg + O2 –> 2MgO tell us in regards to grams?

A

48g of magnesium reacts with 32g of oxygen to give 80g of magnesium oxide (Ar of Mg = 24, Ar of O = 16)

4
Q

What does 2Mg + O2 –> 2MgO tell us in regards to relative masses?

A

(2 x Ar of Mg) + (2 x Ar of O) gives (2 x Mr of MgO)

5
Q

See revision guide and your class book to help with this section

A

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