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Aleks04 [339]
3 years ago
12

Bromine, a liquid at room temperature, has a boiling point of 58°C and a melting point of –7.2°C. Bromine can be classified as a

Chemistry
1 answer:
andreev551 [17]3 years ago
7 0

Answer:

Pure substance.

Explanation:

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er solutions can be produced by mixing a weak acid with its conjugate base or by mixing a weak base with its conjugate acid. The
liubo4ka [24]

Answer:

You need to add 19,5 mmol of acetates

Explanation:

Using the Henderson-Hasselbalch equation:

pH = pKa + log₁₀ [base]/[acid]

For the buffer of acetates:

pH = pKa + log₁₀ [CH₃COO⁻]/[CH₃COOH]

As pH you want is 5,03, pka is 4,74 and milimoles of acetic acid are 10:

5,03 = 4,74 + log₁₀ [CH₃COO⁻]/[10]

1,95 = [CH₃COO⁻]/[10]

<em>[CH₃COO⁻] = 19,5 milimoles</em>

Thus, to produce an acetate buffer of 5,03 having 10 mmol of acetic acid, you need to add 19,5 mmol of acetates.

I hope it helps!

7 0
3 years ago
Water beads up on waxy surfaces because of a ___________ degree of adhesion with the surface?
slavikrds [6]
Low
Water is better at sticking together with other water molecules than it is with the "waxy surfaces".
3 0
3 years ago
Read 2 more answers
A chemist measures the amount of bromine liquid produced during an experiment. She finds that 14.4 g of of bromine liquid is pro
Alex787 [66]

Answer:

0.09 moles of Br₂

Explanation:

Bromine liquid it refers at Br₂ molecule which is liquid at room temperature.

Now to calculate the number of moles we use the following formula:

number of moles = mass (g) / molecular mass (g/mol)

For Br₂ molecule we have:

number of moles = 14.4 / 160 = 0.09 moles of Br₂

5 0
3 years ago
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How is all matter alike?
nignag [31]

All matter (solid, liquid or gas) has a definite shape and occupies a specific volume.

<h2>Hope it helps...</h2>
4 0
2 years ago
Read 2 more answers
A sample of potassium nitrate (49.0 g) is dissolved in 101 g of water at 100 °c, with precautions taken to avoid evaporation of
Oksi-84 [34.3K]
This solution is "supersaturated".

A supersaturated solution is a solution that contains a higher than than the concentration of solute, slight unsettling influence or seeding causes crystallization of abundance solute. 
Supersaturation is a condition of a solution that contains a greater amount of the dissolved material than could be dissolved by the solvent under ordinary conditions.
8 0
3 years ago
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