1 year ago

Chlorine, Cl2,is a gas at room temperature, but bromine, Br2, is a liquid. Why?

Chemistry

1 answer:

Alja [10]1 year ago

3 0

Explanation

Halogens => Cl, Br, I, F => exist as diatomic molecules at room temperature and atmospheric conditions.

F2 and Cl2 are gases

Br2 is liquid

I2 is solid

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Ostrovityanka [42]

Answer:

145 grams of a 0.480 % KCN solution contains 697 mg of KCN.

Explanation:

w/w % : The percentage mass or fraction is mass of the of solute present in 100 grams of the solution.

$w/w\%=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 100$

given = w/w% = 0.480 %

Mass of solute that KCN = 697 mg = 0.697 g

(1 mg = 0.001 g)

Mass of the solution = ? = x

$0.480\%=\frac{0.697 g}{x}\times 100$

$x=\frac{0.697 g}{0.480}\times 100$

x = 145.21 g ≈ 145 g

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