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4 years ago

4. What is the molar concentration and grams/Liter of a NaOH solution if 86 ml are titrated to an

Chemistry

1 answer:

finlep [7]4 years ago

4 0

Answer:

0.0763 M NaOH solution

3.05 g/mol NaOH solution

Explanation:

NaOH + HCl ----> NaCl + H2O

1 mol 1 mol

M(NaOH)*V(NaOH) = M(HCl)*V(HCl)

M(NaOH) *86 mL = 0.0175M*375 mL

M(NaOH) = 0.0175M*375 mL/86 mL = 0.0763 M

0.0763 M = 0.0763 mol/L

M(NaOH) = 23 + 16 + 1 = 40 g/mol

0.0763 mol/L * 40 g/mol = 3.05 g/mol NaOH

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vichka [17]

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3 years ago

Which of these is an element?

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Answer:

Carbon is the only element.

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3 years ago

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You conduct an experiment in which you measure the temperature (T) and volume (V) of a mysterious sphere of gas at several diffe

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Explanation:

It is given that the volume of the gas divided by the temperature is 1.75.

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4 years ago

What is the oh−concentration and ph in each solution? (a) 0.225 m koh, (b) 0.0015 m sr(oh)2?

shepuryov [24]

Q1)
We have been given the OH⁻ concentration, therefore we first need to find the pOH value and then the pH value.
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Q2)
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3 years ago

Which types of electron orbitals will have higher energy than a 4d orbital?

alexdok [17]

Answer:

D) 4f

Explanation:

To determine which electron orbital that will have higher energy than a 4d orbital, we write the electron configuration starting with s-orbital.

2s 2p

3s 3p 3d 3f

4s 4p 4d 4f

5s 5p 5d 5f

6s 6p 6d 6f

7s 7p 7d 7f

In ascending order, 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 3f, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p, 6f, 7d, 7f.

From the electronic configuration formula above, the electron orbitals that have higher energy than a 4d orbital are 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p, 6f, 7d, 7f.

Therefore, 4f is the correct answer.

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3 years ago