Specific heat is used to explain why different substances

a) sink or float

b) change temp. at different rates

c) vaporize or condense at different temp.'s

d) melt and freeze at the same temp.

Write the name of the product formed in the following synthesis reaction. potassium + fluorine

Select the best answer for the question. 13. Which statement accurately describes the relationship between mass and weight? A. An object with twice the mass of another object will weigh twice as much B.

What is the percent of composition by mass of hydrogen in NH4HCO3 (gram-formualmass=79 grams/mole) ?

The atomic mass of hydrogen-1 is 1.008 and the atomic mass of helium-4 is 4.003. Find the difference in grams between 4 moles of hydrogen and one mole of helium.

What will happen to the ability of a gas to dissolve in a liquid if the temperature increases

A student states the following: "Since acetone (nail polish remover) evaporate more readily than water, one would assume that acetone has weaker intermolecular forces than water." Evaluate their claim. (2 sentences)

A catalyst can only be used once. True False

On what basis do we distinguish between substances and separate them from one another?

What is the net ionic equation for the following reaction? H2CrO4 + Ba (OH) 2

How does improving food-storage facilities make farming more sustainable? A. It decreases the amount of water needed. B. It keeps food from rotting as quickly and being wasted. C. It decreases the amount of land needed. D.