I need help with question 5. Ignore my writing A 25.6 B 26.1 C 26.5 D 26.2

Answer : The correct option is, (C) 26.5 L

Explanation :

The combustion of ethylene is:

First we have to calculate the number of moles of water vapor.

From the balanced chemical reaction, we conclude that:

As, 1 mole of react to give 2 moles of

So, 0.535 mole of react to give moles of

Now we have to calculate the volume of water vapor.

Using ideal gas equation:

where,

P = pressure of gas = 100 kPa

V = volume of gas = ?

T = temperature of gas =

R = gas constant = 8.314 L.kPa/K.mol

n = number of moles of gas = 1.07 mol

Now put all the given values in the above formula, we get:

Therefore, the volume of water vapor is, 26.5 L.

1 a

2 d

3 a

4 c

explanation:

a electronegativity decreases beacuse the size of nucleus is bigger.