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ValentinkaMS [17]
2 years ago
7

How many electrons are in an ion of calcium (Ca2+)? A. 2 B. 18 C. 0 D. 22

Chemistry
1 answer:
Elanso [62]2 years ago
7 0
B 18 is the answer ......
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Standard reduction potentials are based on which element?
KonstantinChe [14]
They're based on hydrogen.
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Consider a solution that is 0.05 M HCl. Your goal is to neutralize 1 L of this solution (i.e. bring the pH to 7). You also have
Ilia_Sergeevich [38]

Answer:

The volume of NaOH required is - 0.01 L

Explanation:

At equivalence point ,

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Considering :-

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Given  that:

Molarity_{NaOH}=5\ M

Volume_{NaOH}=?\ L

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So,  

Molarity_{HCl}\times Volume_{HCl}=Molarity_{NaOH}\times Volume_{NaOH}

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Volume_{NaOH}=\frac{0.05\times 1}{5}=0.01\ L

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3 0
3 years ago
water is 11.19% hydrogen and 88.1% oxygen by mass. Lake superior contains about 1.2x10 kg of water. what mass of hydrogen is con
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Answer:

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Explanation:

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What is the definition of the molar mass of an element or compound?
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Answer:

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hope it may help you

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What is the name of the product isotope formed when Thorium-234 decays by beta decay?
defon

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