Answer:
Any Alkali Earth Metal - Group 2A aka Group 16 or polyatomic cation with a 2+ charge
Because it doesn't get direct sunlight so it gets cool
Answer:
Living organisms need water to survive. Many scientists even believe that if any extra-terrestrial exists, water must be present in their environments. All oxygen-dependent organisms need water to aid in the respiration process. Some organisms, such as fish, can only breathe in water. Other organisms require water to break down food molecules or generate energy during the respiration process. Water also helps many organisms regulate metabolism and dissolves compounds going into or out of the body.
Explanation:
Mass = moles x molar mass
so mass of 6 moles of h2 is: 6×1×2 = 12g
Answer:
A. Both freezing and melting are physical changes.
Explanation:
Even if you were to freeze water, the molecules are still water molecules, and vise versa with melting it.
