In chemistry, yes...yes it is.
Answer:
The <em>C)</em> statement is true.
Explanation:
Let's call <em>
</em> the average for the first class and <em>
</em>the average for the second class. The overall average <em>x</em> is then:

Since the average is given by <em>
</em>. We can now calculate <em>x</em> assuming the maximun and minimun values of <em>
</em>, 2400 (which is 100 times 24) and 0 respectivly. That gives:

for it's maximun value and

for it's minimun value. So we get that <em>x</em> is between 36% and 93%.
<u>Answer:</u> The partial pressure of carbon dioxide at equilibrium is 0.0056 atm
<u>Explanation:</u>
The given chemical equation follows:

<u>Initial:</u> 4.00
<u>At eqllm:</u> 4.00-2x x x
The expression of
for above reaction follows:

The partial pressure of pure solids and liquids are taken as 1 in the equilibrium constant expression.
We are given:

Putting values in above expression, we get:

Neglecting the value of x = 718.28 because equilibrium pressure cannot be greater than initial pressure
Partial pressure of
= 0.0056 atm
Hence, the partial pressure of carbon dioxide at equilibrium is 0.0056 atm
2.5gm answer ....2/18x22.5