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yuradex [85]
3 years ago
14

Which compounds have the empirical formula CH20?

Chemistry
2 answers:
maksim [4K]3 years ago
7 0
The answers are A, B, D, and E.
Oksana_A [137]3 years ago
7 0

Answer:

Answer is A.

Explanation:

I hope it's helpful!

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Give the location of the elements found in the periodic table which have the same number of shells.
zmey [24]
B. All members within any group
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3 years ago
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Integrated rate law for second order unimolecular irreversible
kirill115 [55]

Answer:

The rate law for second order unimolecular irreversible reaction is

\frac{1}{[A]} = k.t + \frac{1}{[A]_{0} }

Explanation:

A second order unimolecular irreversible reaction is

2A → B

Thus the rate of the reaction is

v = -\frac{1}{2}.\frac{d[A]}{dt} = k.[A]^{2}

rearranging the ecuation

-\frac{1}{2}.\frac{k}{dt} = \frac{[A]^{2}}{d[A]}

Integrating between times 0 to <em>t </em>and between the concentrations of [A]_{0} to <em>[A].</em>

\int\limits^0_t -\frac{1}{2}.\frac{k}{dt} =\int\limits^A_{0} _A\frac{[A]^{2}}{d[A]}

Solving the integral

\frac{1}{[A]} = k.t + \frac{1}{[A]_{0} }

5 0
3 years ago
A solution is prepared by mixing equal volumes of 0.16 M HCl and 0.52 M HNO3. (Assume that volumes are additive.)
slega [8]

Answer:

The pH of the final solution is 0.16 .

Explanation:

The pH of the solution is defined as negative logarithm of hydrogen ion concentration in a solution.

pH=-\log[H^+]

Concentration of HCl = 0.16 M

HCl(aq)\rightarrow H^+(aq)+Cl^-(aq)

HCl is a string acid .1 molar of HCl gives 1 molar of of hydrogen ions.

[H^+]=0.16 M

Concentration of HNO_3 = 0.52 M

HNO_3(aq)\rightarrow H^+(aq)+NO_{3}^-(aq)

Nitric is a string acid .1 molar of nitric acid gives 1 molar of of hydrogen ions.

[H^+]'=0.52 M

Total hydrogen ion concentration:

[H^+]''=[H^+]+[H^+]'

=0.16 M+0.52 M=0.68 M

The pH of the solution:

\pH=-\log[H^+]''=-\log[0.68 M]

pH = 0.16

The pH of the final solution is 0.16 .

3 0
4 years ago
If is a positive number written in scientific notation, which statements must be true? Select all that apply.
Murrr4er [49]
I think it's B. n could be 5.4
4 0
3 years ago
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what is the half life isotope if after 21 days you have 31.25 g remaining from a 250.0 g starting sample size?
alexgriva [62]

250 --> 125 --> 62.5 --> 31.25


each arrow equals one half life, so 3 half lives


14 days/ 3 half lives =


4.67 days = half life

3 0
3 years ago
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