Explain how calcium (40Ca20) and flourine (19F9) became stable when they form calcium fluoride.

When amoeba reproduce, they replicate their DNA and then divide in half. Thus, A. very few of the offspring's genes come from one parent. B. none of the offspring's genes are identical to those of the parent. C.

What structures allow small particles to cross the cell membrane

The solubility of potassium chloride is 34.2 g/100 g h2o at 20°c. a 68.4-g sample of potassium chloride is added to 200.0 g of water at 20°c. is the solution saturated, unsaturated, or supersaturated?

Prior to their phaseout in the 1980s, chemicals containing lead were commonly added to gasoline as anti‑knocking agents. A 6.897g sample of one such additive containing only lead, carbon, and hydrogen was burned in an oxygen‑rich environment.

i'm bored so ... what is the most common isotope of hydrogen? (i know the answers protium, I just want someone to talk to)

What type of solution is aerated water. why is it so.

What elements form chemical bonds

Which of the following is not a pseudoscientific claim

Which action by the British government was considered by American colonists to be a violation of their rights as Englishmen?

Calculate moles of oxygen atoms in 0.68mol of KMnO4