ZnO(s) + 2HCl(aq) → ZnCl2 (s) + H2O(l)
Look at the moles:
1 + 2 → 1 + 1
How much ZnO do we need to make 50g of ZnCl2? Notice it is these numbers in () and should be 1:1
(1) + 2 → (1) + 1
So we need the same number of moles, but how many moles is 50g of ZnCl2? Zn weight is 65.38g, and Cl is 35.45g. So ZnCl2 is (65.38) + (2 X 35.45)=136.28g
50g/136.28g = 0.3669 moles
What is 0.3669 moles of ZnO now?
O weighs 16g/mol, so add 65.38 + 16 = 81.38
Multiply by 0.3669 moles and get how many grams we need.
In the nucleus. The nucleus is where the protons and the neutrons of the atoms are. Electrons are only have around 1/2000 of a proton's mass, so it is usually ignored
I don't understand the question
The number of molecules decreases.
The answer is C!!!!!!!!!!!!!!!!!!!
