Which of these elements is a halogen? potassium (K) calcium (Ca) vanadium (V) gallium (Ga) bromine (Br)

The pH of a liquid is a measure of how acidic or basic it is. The concentration of hydrogen ions in a liquid is labeled [H^+]. Use the formula pH=-log[H^+] to find the pH level, to the nearest tenth, of a liquid with [H^+].

How does the molecular motion of a substance change when it goes from liquid to solid? A. The molecules gain energy, and their relative motion increases. B. The molecules gain energy, and their relative motion decreases. C.

What type of wave makes up sound

What is a major drawback of using fossil fuels?

Sort the following situations into chemical change or physical change: 1. salt dissolves in water 2. Hydrochloric acid reacts with magnesium to produce hydrogen gas 3. a piece of copper is cut in half 4. a sugar cube is ground up 5.

What water activities might be easier to do in Lake Assal's salty water? What activities could be more difficult?

The suffix "-megaly in the term gastromegaly means:

The harder you strike a drum, the greater the sound's A) medium B) volume C) frequency D) pitch

The equation X + Y 2Z has the rate law equation shown below. Which of the following statements best describes the relationship of X on the rate of the reaction? rate = k[X]2[Y] Changing X has no effect on the reaction rate.

What moves in or out of a substance during a change of state?