ANSWER ASAP PLEASE WILL GIVE POINTS Which sentence about particles in matter is true?

A. Atoms are present in solids and liquids but not in gases.

B

The particles of matter are in constant motion,

c.
The same kinds of atoms are found in different elements.

D
When a solid changes to a liquid, the sizes of the particles change.

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit

What is the mass of 0.46 mol of mgcl2

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?