Stoichiometry

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Stoichiometry

1) Gve your Name, Surname and Grade

2) Give your school eg. MHS (for Muizenberg High School)

3) Stoichiometry concerns itself with ratios of reactants and products in a reaction. When burning C to CO2 this ratio is...

2 points

2:1

1:1

1:2

2:2

Clear selection

4) 1 Mole of any element has mass of...

2 points

Atomic number in g

Atomic mass in kg

Atomic number in kg

Atomic mass in g

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5) 1 mole of any gas occupies how much volume at STP?

2 points

22,4 litres

6.02 litres

Avogadro's number of litres

1 litre

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6) STP involves Standard temperature and pressure. These are respectively...

2 points

273K/0C and 101300 Pa

101kPa and 0 Centigrade

273K and 101kPa

0C and 0Pa

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7) 1 mole of CO2 or 22,4 litres of CO2 has a mass of...

2 points

12g

32g

44g

None of the above

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8) 1kg of C represent how many moles?

2 points

1 mol

12 mol

83,3 mol

1866,66 mol

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9) What percentage of the air is CO2?

2 points

0.4 %

0.04 %

80 %

20 %

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10) if we burn 1 kg of C to produce 1866 litres of CO2 gas and this represents 0.04% of air, then what is the volume of air normally containing 1866 litres of CO2?

2 points

466666 litres

100/0,04 x 1866 litres

24,3 classrooms of air

All of the above

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