Potassium has a mass number of 40 and an atomic number of 19. how many protons does it have?

Which process of the water cycle occur by releasing energy?

A straight chain hydrocarbon with a formula C6 H 12 has a triple C-C bond has a double C-C bond is essentially inert has two double C-C bonds

Balance the following reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coefficient is "1." CH3OH + O2 → CO2 + H2O

Indicate which reaction will occur faster. explain your reasoning. select the single best answer. solvolysis of 1-chloro-2,2-dimethylpropane or tert-butyl chloride in ethanol

What can be known about all four polymers, despite their differences? They come from living things. They share ionic carbon bonds. They are at least 100 monomers long. They are made of repeating subunits.

What is x + 4 = - x - 4?

How many neutrons are in 7.00 g of 13c?

This chart shows discrpitions of the atoms for four different substances. Which substance is a solid

What is habitat destruction?

Nancy wants to find out how the steepness of a hill's slope affects the amount of soil that erodes from it. She has soil, a long pan, and a pile of books with which to build a model hillside. She has a watering can to model rainfall.