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beks73 [17]
3 years ago
12

Which of the following is a mixture? steel water oxygen gold

Chemistry
2 answers:
Liula [17]3 years ago
8 0

The answer is steel because you cannot pick water, oxygen, or gold out of a mixture.

wel3 years ago
3 0

Answer: Steel is a mixture amongst the following substances.

Explanation: Mixture is defined as the substance made up from the mixing of two or more substances.

  • Steel is an alloy or a homogeneous mixture of Carbon, iron and other elements.
  • Water is a compound as it is formed by the chemical combination of hydrogen and oxygen.
  • Oxygen is a molecule constituting same element.
  • Gold is an element as it is a pure substance.
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Answer:

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Explanation:

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The following reactions have the indicated equilibrium constants at a particular temperature: N2(g) + O2(g) ⇌ 2NO(g) Kc = 4.3 ×
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Answer:

Kc=~1.49x10^3^4}

Explanation:

We have the reactions:

A: N_2_(_g_) + O_2_(_g_)  2NO_(_g_)~~~~~~Kc = 4.3x10^-^2^5

B: 2NO_(_g_)+~O_2_(_g_)~2NO_2_(_g_)~~~Kc = 6.4x10^9

Our <u>target reaction</u> is:

4NO_(_g_)  N_2_(_g_) + 2NO_2_(_g_)

We have NO_(_g_) as a reactive in the target reaction and  NO_(_g_) is present in A reaction but in the products side. So we have to<u> flip reaction A</u>.

A: 2NO_(_g_) N_2_(_g_) + O_2_(_g_) ~Kc =\frac{1}{4.3x10^-^2^5}

Then if we add reactions A and B we can obtain the target reaction, so:

A: 2NO_(_g_) N_2_(_g_) + O_2_(_g_) ~Kc =\frac{1}{4.3x10^-^2^5}

B: 2NO_(_g_)+~O_2_(_g_)~2NO_2_(_g_)~Kc=6.4x10^9

For the <u>final Kc value</u>, we have to keep in mind that when we have to <u>add chemical reactions</u> the total Kc value would be the <u>multiplication</u> of the Kc values in the previous reactions.

4NO_(_g_)  N_2_(_g_) + 2NO_2_(_g_)~~~Kc=\frac{6.4x10^9}{4.3x10^-^2^5}

Kc=~1.49x10^+^3^4}

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2 years ago
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Answer:

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