As a Ca atom undergoes oxidation to Ca2+, the number of neutrons in its nucleus

(1) decreases

(2) increases

(3) remains the same

When heat is added to a liquid at the boiling temperature, it converts the liquid into a gas at the same temperature because A) the heat added is lost by the system. B) the heat added is absorbed by the container.

Instruction Active Identifying Direction of Heat Flow Scenario Object 1 Object 2 Indicate the direction of heat flow in each scenario.

The reaction shown below occurs in the blood between hemoglobin (Hb) and oxygen. Hb + O2 ⇄ HbO2 Which of the following correctly describes this reaction: A. equilibrium reaction B. in the lungs, the reaction proceeds to the right C.

Explain how the results of Ernest Rutherford's gold-foil experiment showed that the atom is mostly empty space.

Find the longest wavelengths of light that can cleave the bonds in elemental nitrogen, oxygen, and fluorine. the average bond energy of n-n bond is 945 kj/mol, oxygen is 498 kj/mol, and f-f is 159 kj/mol. give your answers in scientific notation.

An unknown gas has a pressure of. 0240 atm. what is the pressure in torr?

Explain why a wooden spoon is a better choice than a metal spoon for stirring a boiling pot of soup

Is MgCO3 a correct chemical formula

Water is an exaple of a mixture because it is made up of hydrogen and oxygen atoms bonded together true or false

Chlorine plus lithium bromide