A 1.00 carat pure diamond has a mass of 0.2 grams. How many carbon atoms are there within this diamond?

Gold has a , $rho=19.3*g*mL^-1,$ which is approx. 20 times as much water. The density of the gold crown (given to the tyrant of Syracuse, not the king), was...

$"Mass"$ $=$ $4.5" carat"xx0.200*g*"carat"^-1$ $=$ $0.9*g$. And $"Volume"$ $=$ $"Mass"/rho$ $=$ $(0.9*g)/(3.51*g*cm^-3)$ $=$ $0.26*cm^3$.

$rho,"density"="Mass"/"Volume"$, and thus typically has units of $g*mL^-1, g*cm^-3,$ etc. Here we have $rho=3.52*g*mL^-1$, and the mass, $15.1*g$, and so we take the quotient............... $"Volume"="Mass"/rho=(15.1*g)/(rho_"diamond")=(15.1*g)/(3.52*g*mL^-1)$ $~=4*1/(mL^-1)=4*1/(1/(mL))=4*mL............$ So how much do...

$rho,"density"="Mass"/"Volume"$ And thus $"Volume"="Mass"/rho=(0.25*g)/(3.5*g*cm^-3)=0.0714*cm^3$

The relative of carbon is 12.011, which is extremely close to 12.0. This means that the masses C-13, and C-14 are practically negligible when contributing to the relative atomic mass...

This is called the of the element. To make it up to 13 in carbon-13, you will need 7 neutrons. Stable isotopes are not useful at all in radio-dating,...

A single $""^12C$ atom contains 6 nuclear protons, and 6 neutrons, and to a first approx. this represents the mass of the atom. Five $""^12C$ atoms should thus have a...

On Mohs scale, isn't diamond assigned a $10$ on the basis of hardness? Halite is almost a purely ionic material.

Carbon atoms have four electrons in their outer shell. So, it exhibits tetravalency & thus, a single carbon atom can form a maximum of four (4) bonds with other atoms....

$"Calcium cyanide"$ is formulated by taking the calcium ion, $Ca^(2+)$, and binding it to 2 equiv of the cyanide ion, $""^(-):C-=N$. So for $7xxCa$, $10xxC$, and $9xxN$, at most...