Calculations from Balanced Equations Pasted Paper Questions
Calculations from Balanced Equations are NAT 5 Calculations.
Higher Calculations from Balanced Equations from the CfE Higher course include;
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Calculating Reactant in Excess
Calculations Involving Molar Volume
Calculating Percentage Yield/Actual Yield
There are a limited number of NAT 5 Style Calculations from Balanced Equations in Higher Past
Papers and they appear as multiple choice questions .
The written Questions are taken from the old Standard Grade Chemistry Credit papers.
Higher multiple choice questions Past Paper Questions
2002
MC 3
2004
MC 4
2005
MC 4
2008
MC 6
2009
MC 6
2010
MC 6
2011
MC 7
2012
MC 7
Standard grade Chemistry Credit Past Paper Written Questions
2010
Q12(e)
2011
Q12(b)
2013
Q17(c)
Multiple Choice Questions
2002 Q3
2004 Q4
2005 Q4
2008 Q6
2009 Q6
2010 Q6
2011 Q7
2012 Q7
Standard Grade Credit Past Paper
2010 Q12(e)
12(e)
Calculate the mass of hydrogen produced when 4·9 g of magnesium
reacts with an excess of dilute sulphuric acid.
Mg + H2SO4 →
MgSO4 + H2
2011 Q 12(b)
Urea reacts with water, breaking down to form carbon dioxide and ammonia.
H2NCONH2 + H2O →
urea
CO2 + 2NH3
(b) Calculate the mass of ammonia produced, in grams, when 90 g of urea
breaks down.
2013 Q17(c)
The equation for the formation of nitrogen trifluoride, NF3 , is:
N2 + 3F2 → 2NF3
Calculate the mass of nitrogen trifluoride produced from 7 g of nitrogen.
Show your working clearly.