Peoria Charter a ErrQ, LON CAPA X Balance Chem/ | access, Ion-capawcedur A webct

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Peoria Charter a ErrQ, LON CAPA X Balance Chem/ | access, Ion-capawcedur A webct4, import/problems/101 Homework,05/5.05, stoichion Christopher Michael Zeitler (Student section: DD) course Con ts » » Type1-Homework. 05-5,05-stoichiomet For the following unbalanced reaction at 1.00 atm and 26.S°C CHEM 1018 Fall 2015 5 05, stoichiometryS gas.problem MoSz(s) + 02(g) MoOs(s) + SO2(g) What volume of oxygen gas (in L) would be needed to react with 40.8 g of MoS? Report your answer to two decimal places and do not include units To enter a number in scientfic notation, such as 1.5x10, use the following notation: 1.5E-4 L oxygen video intealab (opens in a new window) Submit Answer Tries 7/99 Previcus Tres Post Discussion Esc FS 2 4

Explanation / Answer

The balanced reaction is

2MoS2 + 7O2 ----> 2MoO3 + 4SO2

molar mass of MoS2=160 g/mol

so moles of MoS2 = 40.8/160

=0.255 moles

so moles of O2 gas = 3.5*0.255

=0.8925

let the volume be V litres. Using the ideal gas equation,

PV=nRT

or 1*V=0.8925*(1/12)*(273+26.5)

or V=22.28

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