Answer: The percentage by volume of alcohol will be 21%.
Explanation:
Given: Volume of solute = 14.7
Volume of solvent = 70
Formula used to calculate percentage by volume is as follows.
Substitute the values into above formula as follows.
Thus, we can conclude that the percentage by volume of alcohol will be 21%.
D. i'm pretty sure. hope that helps!
Answer:
174.402 Torr is the partial pressure of oxygen gas.
Explanation:
According to the Dalton's law, the total pressure of the gas is equal to the sum of the partial pressure of the mixture of gasses.
where,
= Total pressure
= partial pressure of gas-1
= partial pressure of gas-2
= partial pressure of gas-3
= partial pressure of nth gas in the mixture
We have:
Now put all the given values is expression, we get the partial pressure of the gas.
174.402 Torr is the partial pressure of oxygen gas.
Answer:
H2 > N2 > Ar > CO2
Explanation:
Graham's law explains why some gases efuse faster than others. This is due to the difference i their molar mass. Generally; The rate of effusion of gaseous substances is inversely proportional to the square rot of its molar mass.
This means gases with low molar masses would have higher efusion rate compared to gases with higher molar masses.
So now we just need to compare the molar masses of the various gases;
Ar - 39.95
CO2 - 44.01
H2 - 2
N2 - 28.01
To obtain the order in increasing rate, we have to order the gases in decreasing molar mass. This order of increasing rate is given as;
H2 > N2 > Ar > CO2