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Nataliya [291]
3 years ago
7

Moseley made revisions to the periodic table that resolved some of the problems with Mendeleev's version. Which of these was a r

esult of his revisions to the periodic table?​
Chemistry
1 answer:
kkurt [141]3 years ago
6 0
His revisions proved the importance of the atomic number and acknowledged why some of the elements seemed like they were out of place, even though they were in the right place.
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When the equation Fe +Cl2 FeCl3 → is balanced, what isthe coefficient for Cl2?
mixas84 [53]

Answer: Option (c) is the correct answer.

Explanation:

The given reaction is as follows.

    Fe + Cl_{2} \rightarrow FeCl_{3}

Number of atoms on reactant side are as follows.

  • Fe = 1
  • Cl = 2

Number of atoms on product side are as follows.

  • Fe = 1
  • Cl = 3

To balance the given equation, we multiply Fe by 2 and Cl_{2} by 3 on the reactant side. Therefore, the balanced chemical equation will be as follows.

           2Fe + 3Cl_{2} \rightarrow FeCl_{3}

Thus, the coefficient of Cl_{2} is 3.

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Warm areas since the molecules move faster when warm meaning more energy

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After measuring the mass of water, the data is averaged and it is determined that the mean of 4
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Explanation:

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Hydrogen sulfide decomposes according to the following reaction, for which Kc = 9.30 10-8 at 700°C. 2 H2S(g) 2 H2(g) + S2(g) If
Vikentia [17]

Answer:

The equilibrium concentration of hydrogen gas is 0.0010 M.

Explanation:

The equilibrium constant of the reaction = K_c=9.30\times 10^{-8}

Moles of hydrogen sulfide = 0.31 mol

Volume of the container = 4.1 L

[concentration]=\frac{moles}{volume (L)}

[H_2S]=\frac{0.31 mol}{4.1 L}=0.076 M

2H_2S(g)\rightleftharpoons 2H_2(g)+S_2(g)

Initially

0.076 M

At equilibrium

(0.076-2x)                         2x     x

The expression of an equilibrium constant :

K_c=\frac{[H_2]^2[S_2]}{[H_2S]^2}

9.30\times 10^{-8}=\frac{(2x)^2\times x}{(0.076-x)^2}

Solving for x:

x = 0.00051

The equilibrium concentration of hydrogen gas:

[H_2]=2x=2\times 0.00051 M=0.0010 M

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4 years ago
H
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Answer:c

Explanation: it's easy

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