3 years ago

Can you put this into your own words.?

Chemistry

1 answer:

kari74 [83]3 years ago

6 0

In my own word like this

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The molar mass of nitrogen (N2) is 28.02 g/mol. What is the mass, in grams, of 4.60 mol of N2?0.1646.0923.4129

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Answer is 128.892 g.

moles (mol) = mass (g) / molar mass (g/mol)

According to the given data,
moles = 4.60 mol
mass = ?
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Consider the reaction. A(aq) = 2 B(aq) Kc = 6.90 x 10 6 at 500 K If a 3.00 M sample of A is heated to 500 K, what is the concent

kirza4 [7]

Answer:

0.004548 M is the concentration of B at equilibrium at 500 K.

Explanation:

A(aq) ⇆ 2 B(aq)

Initially 3.00 M

At equilibrium 3.00 -x 2x

Equilibrium constant of the reaction at 500 K = $K_c=6.90\times 10^{-6}$

Concentration of A at 500 K at equilibrium , [A] = (3.00 -x )M

Concentration of B at 500 K at equilibrium,[B]= 2x

An expression of equilibrium constant is given as:

$K_c=\frac{[B]^2}{[A]}$

$6.90\times 10^{-6}=\frac{4x^2}{(3.00-x)}$

On solving for x:

x = 0.002274 M

[B] = 2 x = 2 × 0.002274 M = 0.004548 M

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0.004548 M is the concentration of B at equilibrium.

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3 years ago