Question

W e applicable 1) Balance the following reaction. _C,H,O + Oai -_CO + H2O a) What mass of O, would be required to react fully
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Answer #1

1)

C4H10O(l) + 6 O2(g) -> 4 CO2(g) + 5 H2O(g)

a)

Molar mass of C4H10O,

MM = 4*MM(C) + 10*MM(H) + 1*MM(O)

= 4*12.01 + 10*1.008 + 1*16.0

= 74.12 g/mol

mass of C4H10O = 12.6 g

mol of C4H10O = (mass)/(molar mass)

= 12.6/74.12

= 0.17 mol

According to balanced equation

mol of O2 required = (6/1)* moles of C4H10O

= (6/1)*0.17

= 1.02 mol

Molar mass of O2 = 32 g/mol

mass of O2 = number of mol * molar mass

= 1.02*32

= 32.64 g

Answer: 32.6 g

b)

Molar mass of C4H10O,

MM = 4*MM(C) + 10*MM(H) + 1*MM(O)

= 4*12.01 + 10*1.008 + 1*16.0

= 74.12 g/mol

mass(C4H10O)= 5.3 g

use:

number of mol of C4H10O,

n = mass of C4H10O/molar mass of C4H10O

=(5.3 g)/(74.12 g/mol)

= 7.151*10^-2 mol

Molar mass of O2 = 32 g/mol

mass(O2)= 8.85 g

use:

number of mol of O2,

n = mass of O2/molar mass of O2

=(8.85 g)/(32 g/mol)

= 0.2766 mol

1 mol of C4H10O reacts with 6 mol of O2

for 7.151*10^-2 mol of C4H10O, 0.429 mol of O2 is required

But we have 0.2766 mol of O2

so, O2 is limiting reagent

Answer: O2

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