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# Constants | Periodic Table The coefficients in a balanced chemical equation provide the mole-to-mole stoichiometry among...

Constants | Periodic Table

The coefficients in a balanced chemical equation provide the mole-to-mole stoichiometry among the reactants and products. The molar mass (in g/mol) can be used as the conversion factor between moles and the mass of a substance. Thus, the balanced equation and molar masses can be used in conjunction with one another to calculate the masses involved in a reaction.

Complete combustion of methane

When methane (CH4) burns, it reacts with oxygen gas to produce carbon dioxide and water. The unbalanced equation for this reaction is

CH4(g)+O2(g)→CO2(g)+H2O(g)

This type of reaction is referred to as a complete combustion reaction.

Part A

Part complete

What coefficients are needed to balance the equation for the complete combustion of methane? Enter the coefficients in the order CH4, O2, CO2, and H2O, respectively.

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1,2,1,2

Correct

Part B

What mass of carbon dioxide is produced from the complete combustion of 7.60×10−3 g of methane?

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nothingnothing

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Part C

What mass of water is produced from the complete combustion of 7.60×10−3 g of methane?

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nothingnothing

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Part D

What mass of oxygen is needed for the complete combustion of 7.60×10−3 g of methane?

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nothingnothing

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mass of CO2 = 2.088*10-2 g

mass of H2O = 1.7089*10-2 g

mass of O2 = 3.308*10-2 g #### Earn Coins

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