Answer:
C. 101.5°C
Explanation:
The computation of the boiling point of a solution is shown below:
As we know that
where,
i = Factor of Van’t Hoff i.e 2KBr
K_b = Boiling point i.e 0.512° C
m = molality 
Now place the values to the above formula
So, the boiling point is
After solving this, the t is
= 100° C + 1.536° C
= 101.536° C
Hence, the correct option is C.
16.91
Add all the values for the volume added then divide by 3 because there are three values
The rms speed of a gas can be calculated using the following rule:
Vrms = sqrt[(3RT) / M] where
R is the gas constant = 8.314 <span>J K^−1 mol^−1
T is the temperature = 32.5 + 273 = 305.5 degree kelvin
M is the molar mass = 2*14 = 28 grams = 0.028 kg
Substitute with the givens in the equation to get the rms speed as follows:
Vrms = sqrt [(3*8.314*305.5) / 0.028]
Vrms = 521.665 m/sec</span>
The answer would be D because from my research it's the only one that didn't have a catalyst
