Amounts of Substances in Equations (OCR GCSE Chemistry A (Gateway Science Suite)): Quizzes
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10 questions from this quiz
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Practise the questions
10 questions from this quiz
What do the numbers in front of formulas in a balanced equation tell you?
What do the numbers in front of formulas in a balanced equation tell you?
The ratio of moles of each substance
In , what is the mole ratio of to ?
In , what is the mole ratio of to ?
1:2
In , how many moles of form from 1 mole of ?
In , how many moles of form from 1 mole of ?
1 mole
In , how many moles of form from 1 mole of ?
In , how many moles of form from 1 mole of ?
1 mole
What is the formula for calculating moles from mass?
What is the formula for calculating moles from mass?
moles = mass ÷ Mr
What do you divide the mass by to find the number of moles?
What do you divide the mass by to find the number of moles?
Mr (or Ar for elements)
How many moles are in 6 g of if the of magnesium is 24?
How many moles are in 6 g of if the of magnesium is 24?
0.25 moles
In the equation , what does the 2 before mean?
In the equation , what does the 2 before mean?
2 moles of hydrochloric acid
If 0.5 moles of react, how many moles of are needed ()?
If 0.5 moles of react, how many moles of are needed ()?
1 mole
Why do you use mole ratios from balanced equations?
Why do you use mole ratios from balanced equations?
To find amounts needed or produced