Which of the following is a compound?

a. air

b. soda

c. sterling silver

d. water

Which of the following is true about an atom of iron and an atom of copper? 1 They have different masses. 2 Both have the same properties. 3 They have an equal number of protons. 4 Both have different types of sub-atomic particles.

Power is calculated by multiplying voltage by a. current. b. energy. c. resistance. d. voltage.

The wavelength of a light wave whose frequency 5.0x 10^9 s^-1 is

60 is what part greater than 48

16. Which planet has a greater mass than the combined mass of all the remaining planets and their moons?

What needs to happen for a solute to dissolve in a particular solvent? A) the attractions between the solute and solvent molecules must be greater than the attractions keeping the solute together and the attractions keeping the solvent together.

Which is a conversion factor for this statement of equality: 12 in. = 1 foot? 12 feet1 in. 12 feet 1 in. 1 in. 12 feet 1 in. 12 feet 1 foot12 in. 1 foot 12 in. 1 foot1 in. 1 foot 1 in.

Which of the following is an incorrect way of rearranging the density formula: a. m=v•d b. V=d/m c. V=m/d d. Both a and b are incorrect

Describe how the periodic table differentiates between metals and nonmetals. I need a very informative description/explanation on this.

When the ideal gas law is arranged as shown below, what property of the gas is being solved for (represented by the X) ? x equals PV over nR