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HELP edexcel a level chem

What is the mass, in grams, of 4-nitrophenol produced from 0.94 g of phenol if the yield
of this isomer is 15%?
(1)
A 0.14
B 0.21
C 0.68
D 1.39

very clueless on why and how the answer is B
Original post by ly2021
What is the mass, in grams, of 4-nitrophenol produced from 0.94 g of phenol if the yield
of this isomer is 15%?
(1)
A 0.14
B 0.21
C 0.68
D 1.39
very clueless on why and how the answer is B

Determine the mol of phenol used.
From that, you get the expected mol of product.
BUT, only 15% is made ... can you see where to go from here?

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