3 years ago

Which is the molar mass of Calcium?

Chemistry

1 answer:

KengaRu [80]3 years ago

5 0

Answer:

40.078 u

Explanation:

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What element is a F-18 Atom

VikaD [51]

Answer:

Sodium Fluoride F 18 Injection is a positron emitting radiopharmaceutical, no-carrier added.

Explanation:

Element Name Fluorine

Element Symbol F

Atomic Number 9

4 0

3 years ago

Can you check this for me?

Aliun [14]

Hi, your answer is correct.

3 0

3 years ago

What is the molarity of a naoh solution if 39.1 ml of a 0.112 m h2so4 solution is required to neutralize a 25.0-ml sample of the

aleksandrvk [35]

The reaction between NaOH and H₂SO₄ is as follows;
2NaOH + H₂SO₄ ---> Na₂SO₄ + 2H₂O
stoichiometry of base to acid is 2:1
NaOH is a strong acid and H₂SO₄ is a strong acid, therefore complete ionization into their respective ions takes place.
number of acid moles reacted - 0.112 M / 1000 mL/L x 39.1 mL = 0.0044 mol
the number of base moles required for neutralisation = 0.0044 x 2 = 0.0088 mol
Number of NaOH moles in 25.0 mL - 0.0088 mol
Therefore in 1000 mL - 0.0088 mol/ 25.0 mL x 1000 mL/L = 0.352 mol/L
Therefore molarity of NaOH - 0.352 M

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3 years ago

Any single type of substance

ra1l [238]

Answer:

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Explanation:

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3 years ago

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jeyben [28]

The correct answer is b.

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3 years ago