How many protons are in Chlorine

What is the element ratio when a bond is formed between lithium and chlorine? A) 1:2 B) 1:7 C) 1:1 D) 2:2

An element that is liquid at room temperature but gas at 100 degrees

Which describes the reaction of a substance to form one or more new substances? A. a physical change B. a change of state C. a chemical change

A small amount of a solid unknown compound was placed into a test tube containing isopropanol. The solid floats on top of the liquid isopropanol. Is this unknown compound considered to be soluble or insoluble?

When the pH value of a solution is changed from 2 to 1, the concentration of hydronium ions ... A) decreases by a factor of 2 B) increases by a factor of 2 C) decreases by a factor of 10 D) increases by a factor of 10

Does a mole of hydrogen have the same mass as a mole of oxygen? explain your answer.

A 0.500-L sample of H₂SO₄ solution was analyzed by taking a 100.0mL aliquot and adding mL of. After the reaction occurred, an excess of ions remained in the solution. The excess base required mL of for neutralization.

Ammonia can be prepared by the reaction of magnesium nitride with water. The products are ammonia and magnesium hydroxide. Write and balance the equation.

Which period is the shortest in the long form of the periodic table? Name all the elements in this period.

A mole of gas at 0.0oC and 760. torr occupies 22.4 L. What is the volume of this gas at 25. oC and 760. torr