Which statement describes how stars are born? Check all that apply

The magnesium and calcium ions present in seawater ([Mg2+] = 0.059 M and [Ca2+] = 0.011 M) can be separated by selective precipitation with KOH. What is the concentration of [Mg2+] when Ca (OH) 2 starts to precipitate? Ksp Mg (OH) 2 = 2.

What ion do acids release in solution?

An atom is the smallest unit of matter. what is the smallest unit of life?

The zinc in a copper-plated penny will dissolve in hydrochloric acid if the copper coating is filed down in several spots (so that the hydrochloric acid can get to the zinc).

A car experiences a 300 N force to the right from the engine and separate 150 N force due to friction and air resistance to the left. (A) Will accelerate to the left (B) Will accelerate to the right (C) Will not accelerate

In a closed system, if a gas is transported to a container with double the volume of the previous container, gas was held in, What is the gases' new volume?

Rebekah is studying a molecule and trying to determine if it is DNA or RNA. Which kind of molecule is she studying? carbohydrate protein nucleic acid lipid

The function of most proteins depends primarily on the

Compare the temperature of water as ice begins to form with the temperature of ice as it begins to melt?

Which elements are present in sugars?