Answer:A
Explanation:
The kinetic molecular theory of matter states that: Matter is made up of particles that are constantly moving. All particles have energy, but the energy varies depending on the temperature the sample of matter is in.This is turn determines shearer the substance exists in the solid, liquid, or gaseous state.
Answer: B
Explanation: im pretty sure my teacher mentioned something about N--h bonds are non polar
Answer:
We know that,
Density= mass upon volume.
mass= 21.93g
Volume= 49.3 - 46.3
= 3 cm³
Density = 21.93÷ 3
= 7.31 g/cm³
Hope it helps :))
Water is called a universal solvent because of its ability to dissolve different types of substances.
The basic unit of life is cell and a large portion of living cell (60%) is made up of water, this is because cells need water to survive. Biochemical reactions are always ongoing in the living cells and water act as solvents under which these reactions occur. Because of the high solubility of water, it is able to dissolve various substances needed by the body, this makes it easy for the substance to participate in chemical reactions and to move from one point to another. Without water biochemical reactions will not be able to occur in cells and this will lead to the death of the cells.
