The correct answer is neon
Answer:
The answer to your question is <u>111 g of CaCl₂</u>
Explanation:
Reaction
2HCl + CaCO₃ ⇒ CaCl₂ + CO₂ + H₂O
Process
1.- Calculate the molecular mass of Calcium carbonate and calcium chloride
CaCO₃ = (1 x 40) + (1 x 12) + ((16 x 3) = 100 g
CaCl₂ = (1 x 40) + (35.5 x 2) = 111 g
2.- Calculate the amount of calcium chloride produced using proportions.
The proportion CaCO₃ to CaCl₂ is 1 : 1.
100 g of CaCO₃ ------------- 111 g of CaCl₂
Then 111g of CaCl₂ will be produced.
Answer:
Chlorine
Explanation:
Hello.
In this case, for the given elements, we are able to know that oxygen has 6 valence electrons, chlorine 7, nitrogen 5 and neon 8, therefore neon is not able to react as it already has 8 valence electrons. Besides, the element having the most valence electrons is chlorine and its reaction with hydrogen forms hydrogen chloride as shown below:
Therefore, the required element is chlorine.
Regards.
Answer is: Kb for ammonia is 1.73·10⁻⁵.<span>
Chemical reaction of ammonia in water: NH</span>₃ + H₂O → NH₄⁺ +
OH⁻<span>.
Kb(NH</span>₃) = ?<span>.
c</span>₀(NH₃<span>) = 0.150 M.
c(NH</span>₄⁺) =
c(OH⁻<span>) = 0.0016 M.
c(NH</span>₃<span>) = 0.150 M - 0.0016.
</span>c(NH₃) = 0.1484 M.<span>
Kb</span>(NH₃) = c(NH₄⁺) · c(OH⁻) / c(NH₃<span>).
Kb</span>(NH₃) = (0.0016 M)² / 0.1484 M.
Kb(NH₃) = 1.73·10⁻⁵.<span>
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