<span>CH4 will effuse the fastest.
The speed of effusion is proportional to the speed of the gas molecules with faster molecules effusing fast than slower molecules. And the speed of the molecules at any given temperature is inversely related to the mass of the molecules with lighter molecules being faster. So let's take a look at the mass of the candidate molecules and see which is lighter and therefore faster.
CH4 - Molar mass is about 16.
CO - Molar mass is about 28
Ar - Molar mass is about 40
CO2 - Molar mass is about 44
If the 4 options, CH4 (methane) is by far the lightest, and therefore the fastest, so will effuse faster than the other 3 gasses.</span>
<span>It's because the product formed with BF3 is more complex which able to decompose AlF3.
</span>AlF3 doesn't dissolve in HF because of the fluorine. It's doesn't allow for coordination due to the hydrogen. However, it will dissolve in KF. If you look at the chemical reaction, it's able to form a salt.
<span>3KF+Al<span>F3</span>−>3KF.Al<span>F3</span></span>
Answer:
W = 20 J
Explanation:
Given that,
The force acting on the dog, F = 5 N
Distance covered, d = 4 m
We need to find the work done by the dog. The work done by an object is given by :
W = Fd
Put all the values,
W = 5 N × 4 m
W = 20 J
So, 20 J of work is done by the dog.
The correct answer is false. <span>Chemical equations are balanced not by changing the subscripts of the molecules instead by changing the coefficients of each molecule. However, the subscripts are helpful in balancing equations because they are used in counting the number of atoms or molecules.</span>
