When a potassium atom forms an ion, it loses one electron. What is the electrical charge of the potassium ion?

A.

-2

B.

-1

C.

+2

D.

+1

How many moles of water are produced when 5 moles of hydrogen gas react with 2 moles of oxygen gas? Balanced equation: 2H2 + O2 → 2H2O A) 2 moles of water B) 4 moles of water C) 5 moles of water D) 7 moles of water

Cell, neclus, genes, chromosomes, tissue, organ, organ system organism arrange in order?

For which of the following processes does the entropy of the system increase? (a) the ripening of a banana, (b) dissolution of sugar in a cup of hot coffee, (c) the reaction of nitrogen atoms to form N2 molecules at 25 ∘C and 1 atm, (d) lightning,

Convert 65 (M/S) into (Km/Hr)

The energy exchange with the environment during a chemical reaction is called the heat of reaction. a. True b. False

It would take one light year to travel to the sun? True or false?

A specific, electrically neutral atom of boron has 5 protons, 5 electrons, and 6 neutrons. what is the mass number of this atom of boron? 6 5 11 16

When does hail happen?

For the reaction, calculate how many moles of the product form when 0.012 mol of O2 completely reacts. Assume that there is more than enough of the other reactant. 4Al (s) + 3O2 (g) →2Al2O3 (s) Express your answer using two significant figures.

Nuclei with too many or too few neutrons are?