1.2mole•20.17g/1mole= 24.20g
Melting is a physical property and a physical change to wax. We know
this because although the wax might melt, it will resolidify into its
original form. Flammability, however, is a chemical change because the
act of burning involves a chemical reaction between the gases in the air
and heat, which cannot be reversed.
1 mole Hg --------------- 6.02x10²³ atoms
?? moles Hg ------------ 1.30x10⁷ atoms
(1.30x10⁷) x 1 / 6.02x10²³ => 2.159x10⁻¹⁷ moles
The answer for this one is C . Organisms are always changing traits
119 (atomic mass)- 50 protons= 69 neutrons