Question

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.

Express your answer as four integers, separated by commas (e.g., 1,2,3,4).

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1,2,1,2

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Part B

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

Express your answer with the appropriate units.

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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?

Express your answer with the appropriate units.

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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?

Express your answer with the appropriate units.

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nothingnothing

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Answer 1

answers =>

mass of CO2 = 2.088*10^-2 g

mass of H2O = 1.7089*10^-2 g

mass of O2 = 3.308*10^-2 g