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3 years ago

Calculate the mass of 0.0455 mol of Ni

Chemistry

1 answer:

Lera25 [3.4K]3 years ago

8 0

Answer:

2.67g Ni

Explanation:

To convert from moles to mass, use molar mass as a conversion factor.

Nickel has a molar mass of 58.69g/mol.

0.0455mol ( $\frac{58.69g Ni}{1 mole Ni}$ ) = 2.67g Ni

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What concentrations of acetic acid (pKa = 4.76) and acetate would be required to prepare a 0.15 M buffer solution at pH 5.0? Not

Leni [432]

Answer:

Acetic acid 0,055M and acetate 0,095M.

Explanation:

It is possible to prepare a 0,15M buffer of acetic acid/acetate at pH 5,0 using Henderson-Hasselblach formula, thus:

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Replacing:

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Replacing (1) in (2):

1,7378[HA] + [HA] = 0,15M

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3 years ago

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Answer:

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Let's refer to the attached phase diagram for CO₂ (not to scale).

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