Answer:

Explanation:
Given,
The density of Helium is 
We need to find the density in Dg/μm
We know that,
1 g = 10 dg
1 cm³ = 10¹² μm³
So,

So, the density of Helium is equal to
.
A because if you multiple it, you will be moving the decimal one time
So that they will mix in better, or more easily. However you want to say it.
Answer:
the answer is D. stress
If a stress is applied, the equilibrium shifts to relieve this change in conditions.