3 years ago

URGENT PLEASE ANSWER

Chemistry

1 answer:

Alona [7]3 years ago

5 0

Answer:

1. nucleus

2.14

3.14

4.3

5. 4+ or 4-

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Atoms and bonds are often represented in chemical structures by balls and sticks, but like organelles, are more complex than the

likoan [24]

Answer:

where is the question?

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3 years ago

t 745 K, the reaction below has an equilibrium constant (Kc) of 5.00 × 102. H2 (g) + I2 (g) ⇌ 2 HI (g) If a mixture of 0.10 mol

spayn [35]

Answer : The concentration of HI (g) at equilibrium is, 0.643 M

Explanation :

The given chemical reaction is:

$H_2(g)+I_2(g)\rightarrow 2HI(g)$

Initial conc. 0.10 0.10 0.50

At eqm. (0.10-x) (0.10-x) (0.50+2x)

As we are given:

$K_c=5.00\times 10^2$

The expression for equilibrium constant is:

$K_c=\frac{[HI]^2}{[H_2][I_2]}$

Now put all the given values in this expression, we get:

$5.00\times 10^2=\frac{(0.50+2x)^2}{(0.10-x)\times (0.10-x)}$

x = 0.0713 and x = 0.134

We are neglecting value of x = 0.134 because the equilibrium concentration can not be more than initial concentration.

Thus, we are taking value of x = 0.0713

The concentration of HI (g) at equilibrium = (0.50+2x) = [0.50+2(0.0713)] = 0.643 M

Thus, the concentration of HI (g) at equilibrium is, 0.643 M

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Is heating sulfur and copper a physical or chemical change?

Nataly [62]

It would be a chemical change

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3 years ago

Calculate the mass of 0.0455 mol of Ni

Lera25 [3.4K]

Answer:

2.67g Ni

Explanation:

To convert from moles to mass, use molar mass as a conversion factor.

Nickel has a molar mass of 58.69g/mol.

0.0455mol ( $\frac{58.69g Ni}{1 mole Ni}$ ) = 2.67g Ni

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Answer: Oxygen, Nitrogen, And Nitrous Oxide

Explanation:

Oxygen, Nitrogen, And Nitrous Oxide Are Just Some Of The Gasses Stored In Gas Cylinders,

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