<span>Total mass = 2.75g
Mass % of Mg = 1.0g x 100/2.75g = 36.36 %
Mass % of O = 1.75g x 100/2.75g = 63.64 %
Mol of Mg = 36.36/24 = 1.515
Mol of O = 63.64/16 = 3.977
Ratio of Mol of Mg and O in the substance = (1.515 : 3.977) x 2 = 3 : 8
The empirical formula of substance is Mg3O8</span>
Answer:
3.
Explanation:
- Al(OH)₃ reacts with HCl to produce AlCl₃ and water according to the balanced equation:
<em>Al(OH)₃ + 3 HCl → AlCl₃ + 3H₂O,</em>
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<em>It is clear that 1.0 mole of Al(OH)₃ reacts with 3.0 mole of HCl to produce 1.0 mole of AlCl₃ and 3.0 moles of H₂O,</em>
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<em>So, the coefficient of HCl is 3.</em>
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Answer:
you add the ballon and put it my balloon
Answer:
A. NO2 gas released, ion is present.
The residue is (ZnO) Zn oxide, ion is present.
The white salt is Zn(NO3)2.
B. CO2 gas released, ion present.
The residue ia (CuO ) Cu(||) oxide, ion present .
The green salt is CuCO3.
C. CO2 gas released, ion present.
The residue Pb(||) oxide, ion is present.
The white salt is PbCO3.
D. CO2 gas released, ion present.
The residue is (ZnO) Zn oxide, ion is present.
The white salt is ZnCO3.