This is science approximately how many elements are there that combine chemically in a great number of ways to produce compounds? a.25 b.50 c.75 d.100

How did planetesmals form planets? a. they broke apart into smaller chunks.b. they collided and stuck together.c. they cooled and pulled ice together.d. they began to rotate.

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?