How many moles of carbon are in a 28.0g sample

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

For each of the following types of reactions, write a general reaction formula in the symbolic form—for example, a + b → ab. single-displacement double-displacement synthesis decomposition

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.