How many different elements are in nine substances

How many moles is 1.50x10^23 molecules NH3

What forces the inner core of Earth to remain solid?

In Thomson's model of the atom, what parts of the atom were in motion

Identify the step that is not part of the scientific method. conduct an experiment form a hypothesis draw a conclusion state the cause

A 2.50-l sample of a colorless gas at stp decomposed to give 2.50 l of n2 and 1.25 l of o2 at stp. what is the colorless gas?

How much is 35° C in F?

Which describes a precipitate in a chemical reaction? a a gaseous product formed from aqueous reactants b a solid reactant that forms aqueous product c a gaseous reactant that forms aqueous products d a solid product formed from aqueous reactants

Prepare a solution that is 0.1 M acetic acid and 0.1 M sodium acetate by measuring out 5.0 mL of the 1.0 M acetic acid solution and 5.0 mL of the 1.0 M sodium acetate solution in a 100 mL graduated cylinder, diluting the 10.

Which element has an ion that is smaller than an ion of calcium?

Which factor is responsible for the weak attraction between diatomic molecules of the halogens (group 7A) ? A) Hydrogen bonding B) Ionic bonding C) Dipole interactions D) London dispersion forces