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1) A 30kg log reacts with 1kg of oxygen in the air to burn. The products are 28kg of ashes and an unknown amount of carbon dioxide and water vapor as smoke. If the smoke was captured to measure the mass of gases produced, what would their mass be?
a.
28kg
b.
1kg
c.
31kg
d.
3kg
2)Water (H2O) is made up of Hydrogen atoms (H) and oxygen (O) atoms. If 150g of hydrogen was reacted with 75g of oxygen, what would the mass of the water be?
a.
75g
b.
225g
c.
150g
d.
200g
Sagot :
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