Answer:
Did you mean to ask how many holes can the drill drill in 25 minutes, then the answer is 50
The result of experiment in mixed fraction form is
particles per milliliter.
<h3>What is the result of the experiment in mixed fraction form?</h3>
To convert decimal to fraction, we the decimal number over 1 and multiply both the numerator and denominator by power of 10.
Given the data in the question;
- Result of experiment in decimal form = 117.755
- Result of experiment in mixed fraction form = ?
In 117.755, we have 3 numbers to the right of the decimal point.
We have 10³ which is the same as 1000.

Next, we divide both the numerator and the denominator with their Greatest Common Factor.
Greatest Common Factor of 117755 and 1000 is 5

Now, we can get 200 out of 23551 exactly 117 times, since what remained is not divisible by 200, we leave it as a remainder [151].
We can now write this in a mixed fraction form as;

Therefore, the result of experiment in mixed fraction form is
particles per milliliter.
Learn more about fractions here: brainly.com/question/10354322
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The reaction is missing and it's ;
N2H4 + H2 ---> 2NH3
It asks for the total pressure too.
Answer:
A) Rate of change for NH3 = 152 torr/h
B) The total pressure in the vessel will remain the same.
Step-by-step explanation:
N2H4 + H2 ---> 2NH3
1 mole of N2H4 yields 2 moles of NH3.
From the question, the rate given for N2H4 is 76 torr/h.
Thus, The rate of change for NH3 will be = 2 x 76 = 152 torr/h
Now, on the reaction side, 1 mole of N2H4 reacts with 1 mole of H2. So we have 2 moles on the left hand side.
While on the product side, 2 moles of NH3 are produced.
So the total pressure will remain the same because for every 2 moles on the reaction side, 2 moles are gotten on the product side.
It could be D but mathematically it's 3/6=1/2