How many atoms are in four molecules of oxygen gas

Assume that acid rain has lowered the ph of a particular lake to ph 4.0. What is the hydroxyl ion concentration of this lake?

How are chloroplast and mitochondrion organelles similar

The following quantities were reported on the labels of commercial products. Determine the number of significant figures in each. (a) 0.0055 g active ingredients (b) 12 tablets (c) 3% hydrogen peroxide (d) 5.5 ounces (e) 473 mL (f) 1.

You and everything around you are made up of matter. What is matter made up of? a. Atoms and molecules b. Atoms and helium c. Gold and iron d. Copper and potassium

The high cohesion of liquid water influences the properties of the air-sea interface as well as the formation of sea spray and aerosols in the atmosphere.

Cobalt fluoride crystallizes in a closest packed array of fluoride ions, with the cobalt ions filling one-half of the octahedral holes. What is the formula of this compound?

When you get into a parked car in the summer time, the metal clip is hot and the seat belt fabric is not. What has a higher specific heat, the metal clip or the seat belt fabric? Think about the definition of specific heat.

A laboratory procedure calls for making 600.0mL of a 1.1M KNO3 solution. How much KNO3 in grams is needed?

How do you make good grades?

What will happen to the pressure inside a rigid container of gas if some of the gas is allowed to escape? (Assuming no change in temperature)