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DochEvi [55]
2 years ago
11

The density of 190mg of a liquid is 0.0076g/cm calculate the volume in ml

Chemistry
1 answer:
Greeley [361]2 years ago
8 0
  • Mass=190mg=0.19g
  • Density=0.0076g/cm³

\\ \rm\Rrightarrow Density=\dfrac{Mass}{Volume}

\\ \rm\Rrightarrow Volume=\dfrac{Mass}{Density}

\\ \rm\Rrightarrow Volume=\dfrac{0.19}{0.0076}

\\ \rm\Rrightarrow Volume=25cm³

\\ \rm\Rrightarrow Volume=25mL

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Using the model of the periodic table, which two elements pictured have similar chemical properties?
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1 and 3

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Consider an atom having four distinct energy levels. If an electron is able to make transitions between any two levels, how many
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Energy levels are the electron shells where electrons are found at a fixed distance from the nucleus of the atom. The atom could emit 6 different wavelengths.

<h3>What is wavelength?</h3>

A wavelength is a distance between the adjacent crests in wave signals propagated in a system. Wavelength (\rm \lambda ) is in inverse relation to the frequency of the wave.

When an electron jumps from energy level 1 to 2, 1 to 3, and 1 to 4 one wavelength each is present. Hence, making the total wavelength to be 3, in transition from the first energy level.

Similarly, from energy levels, 2 to 3 and 2 to 4, a total of 2 wavelengths, and from energy levels 3 to 4 one wavelength is produced.

So the total different wavelengths of the radiation that can be emitted will be 3 + 2 + 1 = 6.

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1 year ago
Select correct examples of linear molecules for five electron groups. Select correct examples of linear molecules for five elect
Shalnov [3]

Explanation:

Formula to calculate hybridization is as follows.

                Hybridization = \frac{1}{2}[V+N-C+A]

where,

V = number of valence electrons present in central atom

N = number of monovalent atoms bonded to central atom

C = charge of cation

A = charge of anion

So, hybridization of BeCl_{2} is as follows.

              Hybridization = \frac{1}{2}[V + N - C + A]

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Hybridization of BeCl_{2} is sp. Therefore, BeCl_{2} is a linear molecule. There will be only two electron groups through which Be is attached.

Similarly, hybridization of XeF_{2} is calculated as follows.

         Hybridization = \frac{1}{2}[V + N - C + A]

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Therefore, hybridization of XeF_{2} is sp^{3}d. Therefore, [tex]XeF_{2} is also a linear molecule. Though there are three lone pair of electrons present on a xenon atom and it is further attached with fluorine atoms through two electron pairs. Hence, there are in total five electron groups.

Thus, we can conclude that out of the given options XeF_{2} is the correct examples of linear molecules for five electron groups.

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