Which 2 statements describe a mixture? 1. It includes atoms of different elements.
2. Its parts can be separated using physical means.
3. It can result from chemical bonding.
4. It is a pure substance.

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

What is the molar mass of ca(cio4)2

Given the following equation: 2a1 + 3mgcl2 --> 2alcl3 + 3mg how many moles of aluminum chloride are produced from 2.5 moles of magnesium chloride?