Consider this reaction: KOH + HBr ➝ KBr + H₂O

Which is the acid in this reaction?

A. KOH

B. HBr

C. KBr

D. H₂O

How many grams of ice could be melted by using 67,000 Joules of energy?

Who discovered neutrons? A. James Chadwick B. Ernest Rutherford C. John Dalton D. J. J. Thompson

6. List three threats to the health of trees in the United States.

When placed in a 100-mL square box, a substance has a spherical shape and has a volume of 50 mL. When placed in a 100-mL circular tube, that same substance has a spherical shape and a 50-mL volume. In what phase or state was the substance?

An atom of lithium-7 has an equal of

If you start with 4 moles of iron and 3 moles of oxygen to produce iron oxide, what is the limiting reagent? (You will need to balance the equation first.) Fe + O2 - > Fe2O3

Is burning wood a physical change

A gas is located inside a closed container. if the gas is allowed to occupy more volume inside the container, what will happen to the pressure? (note: there is no gas added to the container.)

An open-end manometer containing mercury was connected to a vessel holding a gas at a pressure of 767 torr. The atmospheric pressure was 724 torr. What is the difference in the heights of the mercury, expressed in cm?

When does raising the temperature of a gas increase its pressure? A. temperature B. volume C. number of particles D. pressure