Why is the atomic mass of most elements not a whole number?

In the compound NH3, the subscript 3 indicates that?

Whats the definition of organic chemistry

What is the 27th element on the periodic table?

In a chemical equation, the coefficients represent the ...

Which indicator of a chemical change is shown? A science glass with smoke coming out the top formation of a gas. Formation of a precipitate. Change in energy. Change in color.

F. Protection of the body from infectious organisms is accomplished by which of these tissues? a) bone; b) muscle; c) nerve; d) blood

A compound that is composed of molybdenum (Mo) and oxygen (O) was produced in a lab by heating molybdenum over a Bunsen burner. The following data was collected: Mass of crucible: 38.26 g Mass of crucible and molybdenum: 39.

Which of the following elements has electrons in the 3d sublevel?

Which procedure can be used to separate the sand salt and water from each other

What volume does 4.24g of argon gas occupy at 58.2 degrees celcuis and 1528torr