Which statements are correct about Avogadro’s constant? I. It is the number of ions in 12 g of sodium hydride, NaH.
II. It is the number of molecules in 22.4 dm-3 of hydrogen gas at 0 °C and 1 atm.
III. It is the number of atoms in 12 g of 12C

The diagram below shows a cell placed in a solution.a cell is shown placed inside a beaker. it is labeled cell. the solution inside the beaker is labeled 40% salt solution and the solution inside the cell is labeled 20% salt solution.only water is allowed to move in and out of the cell. what will most likely happen to the cell? it will expand as water moves out of it. it will shrink as water moves out of it.it will expand as water moves into it. it will shrink as water moves into it.

Why is carbon ideal for making different compounds?

What energy conversion occurs when a sling shot is used to shoot a rock across the room? (2 points) question 2 options: 1) stored mechanical energy is converted to mechanical energy. 2) stored mechanical energy is converted to radiant energy. 3) gravitational energy is converted to radiant energy. 4) gravitational energy is converted to mechanical energy.