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musickatia [10]
4 years ago
13

Almost 99% of earths atmosphere is made up of two gases. What are the two gases and the percents of each?

Chemistry
2 answers:
timofeeve [1]4 years ago
7 0
The correct answer id A i just did the test

Natali5045456 [20]4 years ago
5 0
The Answer Is A 21% oxygen and 78%nitrogen
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207.2 g/mol

Explanation:

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3 years ago
Acids are described as corrosive because they a. turn litmus blue. b. taste bitter. c. “eat away” at other materials. d. feel sl
Masteriza [31]

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C

Explanation:

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3 years ago
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The rate constant for this second‑order reaction is 0.610 M − 1 ⋅ s − 1 0.610 M−1⋅s−1 at 300 ∘ C. 300 ∘C. A ⟶ products A⟶product
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Answer: It takes 3.120 seconds for the concentration of  A to decrease from 0.860 M to 0.260 M.

Explanation:

Integrated rate law for second order kinetics is given by:

\frac{1}{a}=kt+\frac{1}{a_0}

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\frac{1}{0.260}=0.860\times t+\frac{1}{0.860}

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Thus it takes 3.120 seconds for the concentration of  A to decrease from 0.860 M to 0.260 M.

8 0
4 years ago
Read the following chemical equation. Mg(s) + H+ Cl− → Mg2+ Cl− + H2 What most likely happens during this reaction?
spin [16.1K]

Answer:

Magnesium loses two electrons.

Explanation:

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<em>∴ Mg losses two electrons.</em>

  • Cl⁻ remains as it is, so it is considered as a catalyst and neither loss nor gain any electrons.

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6 0
3 years ago
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The atmosphere is composed of
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3 years ago
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