How many neutrons does potassium have? 2 19 20 39

Solutes usually dissolve best in cold solvents. true or false

Compare and contrast the compositions of binary ionic and binary molecular compounds

The characteristic flame test colors of metal ions are due to atomic emission spectra. Duscuss the relationship between the absoption and emission of light and the factors responsible for flame test colors.

What sets an atom of one element apart from atoms of all other elements?

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. Which of the cell's organelles has stopped working? A. the mitochondria B. the nucleus C. the vacuoles D. the endoplasmic reticulum

What do you need in order to do a stoichiometric calculation? (Choose multiple) Balanced Chemical Equation Molar masses of compounds involved The type of reaction taking place Oxidation Numbers

The correct mathematical expression for finding the molar solubility (s) of sn (oh) 2 is:

18. which bond is most polar? H--F H--Cl H--Br H--I

What kind of reaction is ca (s) + h3po4 (aq) ca3 (po4) 2 (s) + h2 (g)

In the teapot dome scandal, what did the secretary of the interior albert fall lease