Which is the oldest?

A.

Precambrian

B.

Mesozoic

C.

Paleozoic

D.

Cenozoic

1) How much volume would 2.00 moles of gas take up, under standard temperature and pressure conditions? 11.2 L 22.4 L 33.6 L 44.

Two hydrogen atoms interact to form a hydrogen molecule. classify the following statements that describe the stages of bond formation in a hydrogen molecule according to the predominant force existing between the two hydrogen atoms.

In order for work to be done on an object, what must happen to the object?

How much energy is needed to vaporize 127g of water?

Suppose you are trying to find the identity of an unknown pure substance. The valence electrons of the substance's atoms feel an effective nuclear charge of + 1.

Where are tidal generators located? A. in the ocean in the deep water B. in the ocean along the coast lines C. in lakes D. on the beaches

Be sure to answer all parts. select the three most acidic hydrogen atoms in lactic acid, ch3ch (oh) co2h, and rank them in order of decreasing acidity. explain your reasoning.

List the elements that produced the most easily identified colors?

What is the result of mixing the two substances shown here together?

Which reaction should be used to convert propene into alkyl halide