H H H
I I I
H -- C -- C -- N -- H
I I I
H H H
The Is stand for dashes, sorry I couldn't draw this better.
Density allows you to find that for the coin to look like gold, the correct answer is: the mass must INCREASE
Density is the relationship between the mass of a body and its volume is constant for solids and liquids.
ρ = m / V
where ρ is the density, m the mass and V the volume of the body
The mass of the coin is
m = ρ V
initially the coin is silver (Ag) with density, ρ_{Ag} = 10.94 g/cm³ and the density of gold (Au) is ρ_{Au} = 19.32 gr/cm³
As the density of gold is greater than the density of silver, we must use some chemical method, for example electroplating, to introduce a small layer of gold or other golden material on the surface, as this layer is very thin, the increase in volume is very small, the mass of the coins is
m₁ = ρ_{Ag] V
m₂ = ρ_{Au} V
where m₁ and m₂ are the masses of the silver and gold coins, respectively
What
ρ_{Au} > ρ_{Ag}
the mass of the coin must increase
With the density we can find that for the peel to look like gold the mass must INCREASE
learn more about density here: brainly.com/question/15164682
Compounds=Chemically combined, fixed proportions,and components change properties.
Both= Made of elements, and 2 or more components.
Mixtures=Physically combined, variable proportions, and components retain properties.
The percentage composition of CF4 is %C = 13.64% and %F = 86.36%
The solution are as follows:
Molar mass of CF4 = 88
<span>molar mass of C = 12 </span>
<span>molar mass of F = 4x19 = 76 </span>
<span>% C = 12/88 x 100 = 13.64% </span>
<span>% F = 76/88 x 100 = 86.36%</span>
-1/2 because the fourth quantum number is the spin number which can only be 1/2 or -1/2.