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4 years ago

Boiling point and melting point of a gas?

Chemistry

1 answer:

svetoff [14.1K]4 years ago

7 0

It depends on the altitude of where u live

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umka2103 [35]

The answer would be C) it is always the same as it was before the collision

3 0

4 years ago

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An atom in its ground state is excited when it absorbs a single photon of light. The atom then relaxes back to the ground state

aivan3 [116]

Answer: Option (a) is the correct answer.

Explanation:

The given data is as follows.

wavelength of red photon ( $\lambda_{1}$ ) = 700 nm

wavelength of infrared photon ( $\lambda_{2}$ ) = 1750 nm

Therefore, calculate the wavelength of absorbed photon as follows.

$\frac{1}{\lambda_{abs}} = \frac{1}{\lambda_{1}} + \frac{1}{\lambda_{2}}$

= $\frac{1}{700} + \frac{1}{1750}$

= $\frac{2450}{1225000}$

or, $\lambda_{abs}$ = $\frac{1225000}{2450}$

= 500 nm

Therefore, we can conclude that the wavelength of the absorbed photon is 500 nm.

4 0

3 years ago

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2ch4(g) c2h2(g) 3h2(g) describe what is happening within the system when it is at equilibrium in terms of concentrations, reacti

SashulF [63]

Balanced chemical reaction: 2CH₄(g) ⇄ C₂H₂(g) + 3H₂(g).

1) In a chemical reaction, chemical equilibrium is the state in which both reactants (methane CH₄) and products (ethyne C₂H₂ and hydrogen H₂) are present in concentrations which have no further tendency to change with time.

2) At equilibrium, both the forward and reverse reactions are still occurring.

3) Reaction rates of the forward and backward reactions are equal and there are no changes in the concentrations of the reactants and products.

4 0

3 years ago

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Which adaptation is likely to increase the chances of survival of an animal in a rainforest?

LiRa [457]

I know I think it’s a A

6 0

4 years ago

Copper has two naturally occurring isotopes with atomic masses of 62.9296 u () and 64.9278 u (). The atomic mass of copper is 63

natta225 [31]

Answer:

The abundance of first isotope is 69.15 %

The abundance of second isotope is 30.85 %

Explanation:

The formula for the calculation of the average atomic mass is:

$Average\ atomic\ mass=(\frac {\%\ of\ the\ first\ isotope}{100}\times {Mass\ of\ the\ first\ isotope})+(\frac {\%\ of\ the\ second\ isotope}{100}\times {Mass\ of\ the\ second\ isotope})$

Given that:

Since the element has only 2 isotopes, so the let the percentage of first be x and the second is 100 -x.

For first isotope:

% = x %

Mass = 62.9296 u

For second isotope:

% = 100 - x

Mass = 64.9278 u

Given, Average Mass = 63.546 u

Thus,

$63.546=\frac{x}{100}\times {62.9296}+\frac{100-x}{100}\times {64.9278}$

Solving for x, we get that:

x = 69.15 %

<u>The abundance of first isotope is 69.15 %</u>

<u>The abundance of second isotope is 100 - 69.15 % = 30.85 %</u>

4 0

4 years ago