Question

An example of an equation to illustrate the cracking of an alkane from crude oil is...
ve
CosH32 2CH. + CHE + CyHy8
28 42 114
Molar masses/g mol-1
What is the atom economy for this reaction in terms of production of alkenes?
A) 26%
B) 33%
C) 38%
D) 46%
Question 16 of 54
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Answer 1

Answer:

B)33percentage

this is the correct answer

Answer 2

Answer:

d)46%

Explanation:

the trick in the question and even the guy that answered got it wrong is that ethene has a two next to it so

first find total mr = (2x28)+42+114 = 212

then find for only the alkenes = (2x28)+42=98

98/212=0.46

0.46 x100 = 46%

i verified my answer with the mark scheme