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Stoichiometry of single and sequential reactions
NEET level
Single correct option
Difficulty 1 of 3
mc117
Ethane burns as
2
C
X
2
H
X
6
+
7
O
X
2
4
CO
X
2
+
6
H
X
2
O
. How many moles of
O
X
2
are needed to burn 2 mol of
C
X
2
H
X
6
completely?
A
7
B
3.5
C
14
D
2
Answer: A
The balanced equation shows 2 mol
C
X
2
H
X
6
reacts with 7 mol
O
X
2
. So 2 mol of ethane needs exactly 7 mol of
O
X
2
; 3.5 is the amount for 1 mol.
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