Answer:
Zn(OH)₂
<em>Explanation:
</em>
Zn is above Fe in the activity series, so it is more readily oxidized:
Zn(s) ⟶ Zn²⁺(aq) + 2e⁻
The zinc ions go into solution.
The electrons travel from the Zn to the surface of the iron nail, where they reduce the water to hydrogen and hydroxide ions.
2H₂O(ℓ) + 2e⁻ ⟶ H₂(g) + 2OH⁻(aq)
Neither the zinc ions nor the hydroxide ions can move far through the gel.
Their concentration builds up around the hail. The ions find each other and form a precipitate.
Zn²⁺(aq) + 2OH⁻(aq) ⟶ Zn(OH)₂(s)
You take the grams of CO₂ times Avogadro's number divided by the molar mass.
Answer:
100.52
Explanation:
from the ideal gas equation PV=nRT
for a given container filled with any ideal gas P and V remains constant.So T is also constant.R is as such a constant.
So n i.e no of moles will also be constant.
no of moles of Ar=3.224/40=0.0806
no of moles of unknown gas=0.0806
molecular wt of unknown gas=8.102/0.0806=100.52
Answer:
The symbol is the right answer.
Explanation:
The “ Symbol” is the correct answer because chemist uses the letters of the alphabet to denote the element. For instance, the element oxygen is denoted by the letter of the alphabet “O”, the hydrogen is denoted by the letter of alphabet “H”, Boron is denoted by the letter of alphabet “B”, etc. Here these are the examples that use one letter but there are other elements that use more than 1 letter as the symbol. For example, the Chlorine is represented by the Cl.
