What mass of ZnCO3 contains 3.11×1022 O atoms
2 answers:
From the molecular formula of the compound, given as , it’s evident that 1 mole of
consists of 3 moles of oxygen.
In one mole, there are atoms, thus, having 3 moles of oxygen corresponds to
atoms of oxygen.
This means that 1 mole of contains
oxygen atoms.
1 atom of oxygen is equivalent to moles.
From the number of oxygen atoms provided, which is , it will be contained in
moles of
.
The molar mass of is 125.388 g/mol, enabling us to compute the mass as follows:
By rearranging the equation above,
Substituting the values gives us,
Thus, the mass of amounts to 2.16 g.
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Given the mass of =25.6 g
The molar mass of =390.35g/mol
Conversion of mass of to moles:
Conversion of moles to moles of sulfur:
Conversion of moles of sulfur to individual sulfur atoms using Avogadro's number:
1 mol =
Answer:
Al (s) + AgClO3 (aq) will undergo a chemical reaction.
Al(s) + 3AgClO₃(aq) -----> Al(ClO₃)₃(aq) + 3Ag(s)
Cd(s) + CuNO3(aq) will also engage in a chemical reaction.
Cd(s) + 2CuNO₃ -----> Cd(NO₃)₂ + 2Cu
Explanation:
In chemical reactions, metal elements positioned lower in the activity series typically cannot replace those positioned higher in the series.
Metals located lower on the activity series are less likely to oxidize.
The activity series is referenced in this solution. (Note: While Cadmium is not directly illustrated, it falls between Iron (Fe) and Cobalt (Co) within the series.)
- Lead is significantly lower than Magnesium in the activity series, so it cannot displace Mg2+ ions in a solution.
- Aluminium ranks higher than Silver in the series; thus, it can easily oxidize and replace Silver ions from its solution.
- Cadmium is capable of displacing Copper in solution since it ranks higher than Copper in the activity series.
- Platinum is unable to displace Cobalt from a solution, as it ranks lower than Cobalt in the activity series.
