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Ivahew [28]
3 years ago
8

Calculate the ph of a 0.25M solution of monochloroacetic acid at 25 c

Chemistry
1 answer:
Phoenix [80]3 years ago
8 0
<h3>Answer: <em>pH=2.25 </em></h3>

Explanation:

monochloroacetic acid  also means: chloroacetic acid

pKa of monochloroacetic acid= 1.4 x 10^-3  (I believe this should have been given in the problem or perhaps in the textbook)

Formula: pH= pKa + log ( some number in M)

pH= -log (1.4 x 10^-3) + log (0.25M)= 2.85 + -0.602= 2.25

pH= 2.25  

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How many moles of Manganese there in are 5.76 x 10(15) atoms of Mn?
aksik [14]

Answer:

1. 9.57 × 10^-9 moles.

2. 7.38mol

Explanation:

1.) To find the number of moles there are in the number of particles in an atom, we divide the number of particles (nA) by Avagadro's constant (6.02 × 10^23)

Hence, to find the number of moles (n) of Manganese (Mn), we say:

5.76 x 10^15 atoms ÷ 6.02 × 10^23

5.76/6.02 × 10^(15-23)

= 0.957 × 10^-8

= 9.57 × 10^-9 moles.

2.) Mole = mass/molar mass

Molar mass of sodium chloride (NaCl) = 23 + 35.5

= 58.5g/mol

mole = 431.6 g ÷ 58.5g/mol

mole = 7.38mol

7 0
3 years ago
Elements in the same group/family of the periodic table are similar in what way?
Jlenok [28]
Elements in the same group<span> in the </span>periodic table<span> have </span>similar<span> chemical properties. This is because their atoms have the </span>same<span> number of electrons in the highest occupied energy level. </span>Group<span> 1 </span>elements<span> are reactive metals called the alkali metals.</span>Group<span> 0 </span>elements<span> are unreactive non-metals called the noble gases.</span>
4 0
3 years ago
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The C=C bond in 2-cyclohexenone produces an unusually strong signal. Explain using resonance structuresBased on the above resona
frosja888 [35]

Answer:

When two single single bonds separated by a double bond (e.g C=C-C=C or C=C-C=O in the case of 2-cyclohexenone), the effect of resonance among those there bonds will be observed.

Explanation:

Since the Oxygen atom has higher electronegativity, it will cause the electrons in the resonance bonds 'flow' toward the Oxygen atom, so that the C=C will 'lose' some electron. The signal read for that bond will be different from other alkene structure.

Attachment is the resonance structure of 2-cyclohexene.

8 0
3 years ago
Which pieces of equipment would be used to measure the density of a solution?
Inessa05 [86]

Answer:

c I've taken chem 3 times

Explanation:

5 0
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How did the elements begin to stratify?
Bogdan [553]

Answer:

The process of elemental stratification relies on the diffusion velocity, which causes the migration of the different chemical elements within stars.

Explanation:

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2 years ago
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