Importance<span> of </span>Valence Electrons<span>. When two atoms approach each other and react with each other, it is their outer shells that come into contact first, and it is therefore the </span>electrons<span> in their outer shells that are normally involved in any chemical reaction.</span>
A or c probably I think a tho
The empirical formula Of Tin oxide is calculated as follows
Find the mass of oxygen = 0.635 - 0.500 = 0.135
then calculate moles of each element
moles =mass/molar mass
that is Tin(Sn) = 0.500/118.71 = 4.21 x10^-3 moles
for oxygen= 0.135/16= 8.44 x10 ^-3 moles
find the mole ratio by dividing with the smallest mole (4.21 x10^-3)
Sn = ( 4 .21 x10^-3) / (4.21 x10^-3)= 1 mole
O= (8.44 x10^-3 ) /(4.21 x10^-3) = 2 mole
therefore the empirical formula = SnO2
1. A
2. B
3. A
4. D
5. A
Explanation:
I think that should be correct
Basically what we are trying to do here is see if we are going from molecules to moles or moles to molecules.
We know that avogadro's number is 6.022x10^23 molecules in 1 mol of anything.
So if the questions asks you to convert moles to molecules just multiply it by avogadro's number
If the question asks you to convert molecules to moles just divide by avogadro's number
Answer:Minerals form when rocks are heated enough that atoms of different elements can move around and join into different molecules. Minerals are deposited from salty water solutions on Earth's surface and underground
Explanation: