Answer:

one atom of an element = 6.02 \times {10}^{23} atom
The mass of one atom of sulphur = 32g
The mass of one atom of aluminium = 27g
so one atom of aluminium = 6.02 \times {10}^{23}
27g of AL = 6.02 \times {10}^{23} atom
2.70g of AL = X atoms
Then you cross multiply ........
and get the answer
.
3.4 x10^3 best answer to the question
Answer:

Explanation:
The original calculation to find the number of moles which is
can be rearranged to give the equation
. Therefore the amount of molecules can be found by
(multiplying by Avogadro's Number)
Answer:
MgO + 2 HNO3 → Mg(NO3)2 + H2O
Explanation: