Consider the unbalanced chemical equation HBr + B = BBr3 + H2. When

coefficients are added to balance the equation, which two substances will

have a coefficient of 2?

D A. H2

B. HBr

C. BBrg

D D B

Calculate the final Temperature (Kelvin) required to change the volume of 100 L of Helium at 256 K to 150 L, assuming the pressure is constant.

2. What is the total number of grams of KCl in 1.00L of 200M solution?

What is benzoxazole?

How do particles move when they are changing phases?

Ms. Copeland's students built this model of an aquifer. Once built they added water and then on the top of the "hill" poured a small amount of used black motor oil simulate chemical pollution.

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?