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3 years ago

Explain how iodine can be obtained from iodine-sodium chloride mixture

1 answer:

5 0

When iodine is heated gently it undergoes sublimation which it changes from solid to a vapour
When this vapour hits a cold surface, it undergoes deposition where it changes from a gas to a solid

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When A new Bond Forms in A Chemical Reaction ,what Happens

Anna [14]

The correct answer would be A. Energy is released.

Hope this helps! :)

4 0

3 years ago

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find the total pressure of a gas that initially occupied 27 L at 32 degrees Celsius and 2.5 atm, if the final conditions are 12

yawa3891 [41]

Answer: Total pressure of the gas will be 0.716atm.

Explanation: We are given a gas having initial conditions as

V = 27L

T = 32°C = 305K

P = 2.5atm

As the gas remains same, number of moles of a gas will also be same for initial and final conditions. To calculate the number of moles, we use ideal gas equation, which is,

$PV=nRT$ .......(1)

where, R = gas constant = $\text{0.08206 L atm }mol^{-1} K^{-1}$

For calculating number of moles:

$n=\frac{PV}{RT}$

Putting the values of initial condition in this equation, we get

$n=\frac{(2.5atm)(27L)}{\text{(0.08206 L atm }mol^{-1} K^{-1})(305K)}$

n = 2.696 mol

Now, the final conditions are,

V = 88.0L

T = 12°C = 285K

n = 2.696 mol (calculated above)

P = ? atm

Again using equation 1, we get

$P=\frac{nRT}{V}$

$P=\frac{(2.696mol)(\text{0.08206 L atm }mol^{-1} K^{-1})(285K)}{88.0L}$

P = 0.716atm.

7 0

3 years ago

Read 2 more answers

Which of the following electron transitions would be associated with the lowest energy of emitted light? HELP

mezya [45]

Answer:

Hope it's helpful to you

4 0

3 years ago

naturally as mixtures of two abundant isotopes. Chlorine occurs as 35Cl (75.8%) and 37Cl (24.2%); Bromine occurs as 79Br (50.7%)

anyanavicka [17]

Answer:

Masses of bromobenzene molecular ions will occur at 156 and 158 m/z.

Explanation:

The molecular ion peak is the signal in the mass spectrum of a compound that represents the molecular ion (denoted as M). Compounds that are composed of atoms having abundant isotope also shows M +1 and M+2 peaks (depending on the isotope).

In the given bromobenzene compound, an atom of bromine is present. The two isotopes with considerable relative abundance of Br are 79Br and 81Br with a difference of two units in their mass. This means that two molecular ion peaks with a difference of two units will appear in the mass spectrum. The mass of the whole compound is 156 amu. Hence, the molecular ion peaks will appear at 156 m/z and 158 m/z due to the two isotopes of bromine.

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4 years ago

Which of the following is a physical change?

Lina20 [59]

C. Rust forming on an iron fence

3 0

3 years ago