Answer:
A. an equal and opposite reaction force
Explanation:
This means that there is a natural reaction of force
The animals have to adapt to their new environment meant and continue mating so they do not go extinct
Answer: 128 g/mol
Explanation:
Graham's law states that the rate of effusion of a gas is inversely proportional to the square root of the molar mass of its particles.
Mathematically, that is:

Since, you know the ratio of two rates and the molar mass of one gas, you can calculate the molar mass of the other gas.
The molar mass of the oxygen molecule, O₂ = 2×16.0g/mol = 32.0 g/mol.
In the coming equations, I will use 32 g/mol for simplicity of writing.

So, the molecular mass of the unnknown gas is 128 g/mol.
Polar and non polar bonds only have to do with non metals. non polar have to do with non metal diatomic molecules while polar bonds deal with non metals that have different electronegativities