What is true about an element
1 answer:
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Answer:
% yield = 73.48 %
Explanation:
The fermentation reaction is:
C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂
The percent yield of C₂H₅OH is given by:
<em>where : is the obtained mass of C₂H₅OH = 67.7g and
: is the theoretical mass of C₂H₅OH. </em>
The theoretical mass of C₂H₅OH is calculated knowing that 1 mol of C₆H₁₂O₆ produces 2 moles of C₂H₅OH:
<em>where M: is the molar mass of C₂H₅OH = 46.068 g/mol</em>
Hence, the percent yield of C₂H₅OH is:
I hope it helps you!
Answer:
Explanation:
At 5 s the body has travelled 10 m.
Between 5 s and 10 s, the body reached 30 m.
Distance travelled = 30 m - 10 m = 20 m
Time = 10 s - 5 s = 5 s
Answer:
The sample of nitrogen must be taken to 267 .
Explanation:
Let's assume nitrogen gas behaves ideally.
Here amount of nitrogen gas in both states remain constant.
So, in accordance with combined gas law for a given amount of an ideal gas in two different states:
where and
are initial and final pressure respectively.
and
are initial and final volume respectively.
and
are initial and final temperature (in kelvin scale) respectively.
Here ,
,
and
So
540 K = (540-273) = 267
So the sample of nitrogen must be taken to 267 .