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Anna007 [38]
3 years ago
6

For a single substance at atmosphericpressure, classify the following as describing a spontaneousprocess, a nonspontaneous proce

ss, or an equilibrium system.1. Solid melting above its melting point2.liquid freezing below its freezing point3. gas condensing above its condensation point4. liquid vaporizing below its boiling point5. solid melting below its melting point6. solid and liquid together at the melting point with no netfreezing or melting7. gas condensing below its condensation point8. liquid and gas together at the boiling point with no netcondensation or vaporization9. liquid freezing above its freezing point10. liquid vaporizing above its boiling point
Chemistry
1 answer:
Archy [21]3 years ago
7 0

IDK IDK IDK IDK IDK IDK

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3.
Vsevolod [243]

Answer:

2 half-lives=0.8

6 half-lives= 0.05

Explanation

Half-lives are constant and always decrease by half, implying that the concentration decreases by half at a consistent rate.

3.2/2= 1.6/2= 0.8 is two half-lives

3.2/2= 1.6/2= 0.8/2= 0.4/2= 0.2/2= 0.1/2=0.05 is six half-lives

3 0
3 years ago
For the reaction, identify the Lewis acid and the Lewis base.<br> AlF3 + CH3F → CH3+ + [AlF4]-
Ivanshal [37]
Answer:
            AlF₃ is Lewis Acid

            CH₃F is Lewis Base

Explanation:
                     According to Lewis concept ,"those compounds which donate pair of electrons are called as Lewis Base and those accepting pair of electrons are called as Lewis Acid.

In Given Reaction,
<span>                               AlF</span>₃<span> + CH</span>₃<span>F → CH</span>₃⁺<span> + [AlF</span>₄<span>]</span>⁻

AlF₃ is acting as acid because the octet of Al is not complete, hence it has tendency to accept electrons.

CH₃F is acting as a base because the F atom containing three lone pair of electrons can donate it to Al metal resulting in the formation of electrophile i.e. CH₃⁺.
5 0
3 years ago
How do I calculate the molecular and molar masses of compounds​
ludmilkaskok [199]

Answer:

The molar mass is the mass of a given chemical element or chemical compound (g) divided by the amount of substance (mol). The molar mass of a compound can be calculated by adding the standard atomic masses (in g/mol) of the constituent atoms.

6 0
3 years ago
Ultraviolet radiation and radiation of shorter wavelengths can damage biological molecules because they carry enough energy to b
Kamila [148]

Answer:

344 nm is the longest wavelength of radiation with enough energy to break carbon-carbon bonds.

Explanation:

C-C(g)\rightarrow 2C(g) ,ΔH = 348 kJ/mol

Energy required to break 1 mole of C-C bond = 348 kJ

Energy required to break 1 C-C bond = E

E = \frac{348,000J}{6.022\times 10^{23}}=5.779\times 10^{-19} J

Energy related with the wavelength of light is given by Planck's equation:

E=\frac{hc}{\lambda }

\lambda =\frac{hc}{E}

=\frac{6.626\times 10^{-34} Js\times 3\times 10^8 m/s}{5.779\times 10^{-19} J}

\lambda =3.44\times 10^{-7} m = 344 nm

1 m =10^9 nm

344 nm is the longest wavelength of radiation with enough energy to break carbon-carbon bonds.

5 0
3 years ago
A star's mass determines the —
kvasek [131]
It’s either A or C sorry I can’t help more
6 0
3 years ago
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