The mass of one mole of aluminium is 27g.
What is the mass of one aluminium atom?
What volume of Carbon dioxide is produced when 10cm3 of ethane is burnt in pure oxygen?
What volume of hydrogen is produced when 2g of magnesium reacts with excess hydrochloric acid according to the equation (assume the molar volume is 24 litres)
The combustion of ethan can be summarised by the equation
C2H6(g) = 3 1/2 02(g) gives 2CO2(g) + 3H20(g)
If air is 20%, by volume of oxygen how much air is needed to completely burn 10 litres of ethane?
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Help With Questions
Started by gary, Oct 24 2004 09:54 AM
2 replies to this topic
#2
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Posted 24 October 2004 - 11:51 AM
1) 1 mol = 27g (1 mol = 6.02*10^23 atoms
1 atom = 27/ 6.02*10^23
2) c2H6 + 3.502 -> 2CO2 + 3H20
1 2
10 Cm3 20 cm3
3) Mg + 2HCl -> MgCl2 + H2
2g Mg = 2/24 moles = 0.083
0.083 -> 0.083
H2 produced = 0.083 moles = 0.083 * 24 = 2 litres
4) to burn 10 litres of ethane you need 35 litres of oxygen
35 litres of oxygen is found in 175 litres of air
1 atom = 27/ 6.02*10^23
2) c2H6 + 3.502 -> 2CO2 + 3H20
1 2
10 Cm3 20 cm3
3) Mg + 2HCl -> MgCl2 + H2
2g Mg = 2/24 moles = 0.083
0.083 -> 0.083
H2 produced = 0.083 moles = 0.083 * 24 = 2 litres
4) to burn 10 litres of ethane you need 35 litres of oxygen
35 litres of oxygen is found in 175 litres of air
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