The balanced equation for the above reaction is as follows;
Mg + 2HCl ---> MgCl₂ + H₂
stoichiometry of Mg to HCl is 1:2
number of Mg moles reacted - 3.5 mol
1 mol of Mg reacts with 2 mol of HCl
therefore 3.5 mol of Mg requires - 2 x 3.5 = 7.0 mol of HCl
number of HCl moles required to completely react with 3.5 mol of Mg is 7.0 mol of HCl
Answer:
"True"
Explanation:
Breathing released by humans is naturally acidic. When humans inhale, there are also dangerous toxic substances such as carbon dioxide in the lungs inside the human body, which are neutralized with the help of HCl hydrochloric acid, but due to hydrochloric acid, the breath that man leaves becomes acidic.
The group number tells you the total number of electrons present in the outermost orbit of an atom. In other words, group number tells you the number of valence electrons of an atom.
Answer:
The answer to your question is: CuSO₄ 5H₂O
Name: copper (II) sulfate pentahydrate
Explanation:
Data
copper (II) silfate hydrate = 3.97 g
copper (ii) sulfate mass = 2.54g
Correct formula = ?
CuSO₄ X H₂O
Process
Quantity of water = 3.97 - 2.54
= 1.43 g
MW of water
18 g of H2O ---------------- 1 mol
1.43 g ----------------- x
x = (1.43 x 1) / 18
x = 0.079 moles of water
MW CuSO₄ = 160 g
160 g ----------------------- 1 mol
2.54 g --------------------- x
x = (2.54 x 1) / 160
x = 0.016 moles
Divide by the lowest number of moles
CuSO₂ = 0.016 / 0.016 = 1
H₂O = 0.079 / 0.016 = 4.9 ≈ 5
then, the formula will be
CuSO₄ 5H₂O
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