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The rule “like dissolves like” explains why liquids are generally soluble in other liquids.

How many molecules are in an 8.0-g sample of oxygen gas, ?

The maximum number of valence electrons is eight.

Heisenberg’s uncertainty principle says that you cannot know the momentum or the position of an electron exactly.

A candle with a certain weight melts in an oven; compared to the weight of the solid wax, the weight of the melted wax is

The density of a 100-g piece of iron is twice as great as the density of a 50-g piece of iron.

Ionic bonds involve the transfer of electrons from one atom to another.

The subscript “2” in Mg(OH) tells you that the charge of the hydroxide ion is (-2).

While exploring an ancient Mayan tomb, you discover that the walls begin to move and are closing in on you. By exerting 400 N of force, you are able to keep a wall from coming closer. The work you are doing on the wall is

The rate of flow of electric charge is measured in units of