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AS TRANSITION COURSE
SUMMER 2012



PART 2: USING CHEMICAL EQUATIONS

MASS AQUEOUS VOLUME ` MOLAR MASS




GASEOUS VOLUME MOLES CONCENTRATION

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REVISION FROM LESSON 1


How many moles?

1) Jahin weighs a sample of CaCO3 and records a mass of 5.0 g. How many moles of
calcium carbonate are present?




2) Fatima measures out 50 cm3 of 0.1 moldm-3 hydrochloric acid. How many moles
of hydrochloric acid are present?




3) Hussain…

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This equation shows that 6 moles carbon dioxide of react with 6 mole of water to make 1
mole of glucose and 6 moles of oxygen.

6: 6: 1: 6

a) How many moles of water are needed to react with 0.03 moles of carbon dioxide?
b) How many moles…

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- calculate the number of moles of one of the substances (you will either be
given the mass, or the aqueous volume and the concentration, or the gaseous
volume)

- use the equation to work out the number of moles of the other substance

- use one of the mole…

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5) What mass of aluminium oxide is produced when 135 g of aluminium is burned in oxygen?

2 Al + 3 O2 Al2O3 (3)




6) What mass of iodine is produced when 7.1 g of chlorine reacts with excess potassium
iodide?

Cl2 + 2 KI 2 KCl + I2 (3)…

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10) What mass of calcium carbonate is required to produce 1.2 dm3 of carbon dioxide?

CaCO3 CaO + CO2 (3)




11) What mass of magnesium oxide is formed when magnesium reacts with 6 dm3 of oxygen?

2 Mg + O2 2 MgO (3)




12) What volume of carbon dioxide is…

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