How many atoms of oxygen are contained in 47.6 g of $Al_2(CO_3)_3$? The molar mass of $Al_2(CO_3)_3$ is 233.99 g/mol.

The first thing that you need to do here is to convert the mass of aluminium carbonate to moles by using the compound's molar mass. In this case, you...

And so there are $2xxAl+3xxC+9xxO="14 atoms"$. How many atoms in one mole of the stuff?

Both questions ask the same thing in opposite ways. One gives you $"16.26 mg"$ containing $1.66xx10^20$ $"atoms"$. That gives you a mass and a quantity, which is enough to convert...

It is given that both salts contain the same number of sulfur atoms. Thus we have $Al_2S_3O_12$, and necessarily $3$ $xx$ $H_2SO_4$. There are $3$ $"equiv"$ sulfuric acid per equiv...

$Al_2(SO_4)_3$ formally derives from an aluminum trication, $Al^(3+)$, and a sulfate dianion, $SO_4^(2-)$. Now ionic substances form to balance charges, and the only way to achieve neutrality for these net...

In one mole of aluminum sulfate, $"Al"_2"(SO"_4")"_3"$, there are 2 moles Al atoms, 3 moles sulfur atoms, and 12 moles O atoms. To determine the number of moles of atoms...

So $(64.3*cancelg)/(233.99*cancelg*mol^-1)$ $~=$ $0.25$ $mol$.

The formula of aluminium fluoride is $"AlF"_3$. This tells us that one formula unit of $"AlF"_3$ contains one atom of $"Al"$ and three atoms of $"F"$. It also...

With reference to the given balanced equation for the , the needed number of moles for each remaining compound involved in the reaction using the mass of $Al$ as basis...

We know that $1*mol$ contains $6.022xx10^23$ individual sodium atoms, and has a mass of $22.99*g$. And thus for $1.$ there is a $2*g$ mass of $Na$. For $2.$ there is...