Which is an example of chemical change

A. mixing of posted colors

B. formation of clouds

C. sugar dissolving in water

D. separating salt from seawater

Which word describes AH for exothermic reactions? O negative O small positive O zero

What is the difference between a strong acid and a weak acid?

Calculate the molarity if 4.5 moles of sodium chloride is dissolved to make 0.15 liters of solution

A gas in a balloon at constant pressure has a volume of 185 mL at - 125*C. What is it's volume at 31.0*C? Show all work including what equation or gas law you use.

Which statement describes J. J. Thomson's plum-pudding model of the atom? A. The electrons take up most of the space in an atom. B. The electrons in the atom orbit around the protons. C. The electrons are embedded in a positive sphere.

Which oxygen pachages materials and distributed them throughout the cell

How many atoms in 3 mol zn

Isotopes: are atoms of different elements which have the same mass are atoms of the same element with equal numbers of neutrons are atoms of the same element with different numbers of neutrons are atoms of the same element with equal numbers of

What would happen to the volume of a sample of gas if the temperature was decreased at the same time the pressure was increased?

How do the compounds that cause acid rain spread from their source?