https session masteringde trycom/myeti temview assignmentproblemlDa80736831 1405
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https session masteringde trycom/myeti temview assignmentproblemlDa80736831 1405-03 Introductory Chemistry Spring 2017 Reactants and Products previous I Sof Part B Reactants and Products Masses of Calculate the mass of water produced when go butane reacts wth excess oxygen Express your answer to three signincantsgures and include the appropriate units. Butane, CHa reacts wn O, to form water. and carbon dioxide con as shown in the flowng 858 g The coescients in this equation represent mole ratios. Notice tharthe coeficient for water (10) s fve times that of butane Thus, the number of moles of water producedistve times the number of moles of butane that react Significant Figures Feedback Your answer 859 was either rounded diferently or used a dnerent number of signicant sguresthan required Also, notice that the coeficient for butane 20 is one-ourth for this part the conscient of carbon doode (8) Thus, the number of one ourth the number of moles moles of butane that react is of carbon doode that you produce But be careful you are given the mass of a compound you must first convert to moles before applyingthese atos Part C calculate mass of butane needed to produce B59 gofcarbon dioxide Express your answer to three significant figures and include the appropriate units. Value Units Suteri Hints My answers Renew Part a O Ask me anythingExplanation / Answer
Molecular weight butane C4H10 = 58g and CO2 =44g
2C4H10 + 13O2 ---> 8CO2 + 10 H2O
8 moles CO2 is formed from 2 moles of C4H10
So we can write
8 x 44g CO2 is formed from 2 x 58g C4H10
Hence
85.9g CO2 is formed from
85.9g x 116g / 352g
hence the solutions is 28.31 g
butane needed to produce 85.9 g of carbon dioxide is 28.31 g
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