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4 years ago

What do phase diagrams demonstrate?

Chemistry

2 answers:

andre [41]4 years ago

8 0

Explanation:

Humildade

Ser justo (Fair Play)

Vencer independente

alexira [117]4 years ago

7 0

Answer:

this answer is for first one

Explanation:

A higher evalations, where the atmospheric pressure is much lower, the boiling point increase with increased pressure up to the critical point where the gas and liquid properties become identical

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Suppose a student performed the titration, but the solution never turned pink. Check all the possible explanations. The student

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The answer is The student forgot to add phenolphthalein.
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A sample of nitrosyl bromide (nobr) decomposes according to the equation 2nobr(g)⇌2no(g)+br2(g) an equilibrium mixture in a 5.00

Alex73 [517]

Answer:

Kc = 0.122.

Explanation:

We can calculate Kc from the relation: Kc = [NO]².[Br₂] / [NOBr]².

Firstly, we convert the number of grams of each component to moles using (n = mass / molar mass).

n of NOBr = (3.26 g / 109.8 g/mole) = 0.03 moles.

n of NO = (3.06 g / 29.9 g/mole) = 0.102 moles.

n of Br₂ = (8.15 g / 159.9 g/mole) = 0.051 moles.

Then we can get the concentration of each component by dividing its no. of moles by the volume of the vessel (concentration = n / V).

The concentration of NOBr = (0.03 mole / 5.00 L) = 6x10⁻³ mol/L.

The concentration of NO = (0.102 mole / 5.00 L) = 2x10⁻² mol/L.

The concentration of Br₂ = (0.051 mole / 5.00 L) = 1x10⁻² mol/L.

Now, we can get Kc:

Kc = [NO]².[Br₂] / [NOBr]² = (2x10⁻² mol/L)².(1x10⁻² mol/L) / (6x10⁻³ mol/L)² = 0.122.

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