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telo118 [61]
3 years ago
13

How many molecules are in a 6.82 gram sample of Hydrogen Sulfide (H2S)

Chemistry
1 answer:
Alinara [238K]3 years ago
5 0

Answer:

1.204×10^(23)

Explanation:

Molecular weight of H2S,  M = 1*2+32 = 34

weight of sample, m = 6.82 gram

now number of moles, n= m/M

n= 6.82/34 = 0.200 moles

1 mole has 6.023×10^(23) molecules of H2S.

therefore 0.2 moles of H2S will have  0.2×6.023×10^(23) = 1.204×10^(23) number of H2S molecules.

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2 moles of Ag is how many<br> atoms?
BabaBlast [244]

Answer:

1.2 x 10²⁴ atoms

Explanation:

Given:

      Number of moles of Ag  = 2moles

 Unknown is the number of atoms it contains:

Solution:

A mole of any substance is known to be made up of 6.02 x 10²³ atoms

  Now;

          2 moles of an atom will contain:

                         2 x 6.02 x 10²³  = 1.2 x 10²⁴ atoms

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3 years ago
What types of medicines are causing problems when improperly disposing of them?
Vitek1552 [10]
Prescription drugs, especially drugs like opiates, are causing problems.
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3 years ago
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chubhunter [2.5K]
Answer: i believe it’s the second one !
6 0
3 years ago
Rank the solutions in order of decreasing [H3O ]. Rank solutions from largest to smallest hydronium ion concentration. To rank i
Usimov [2.4K]

Answer:

0.10M HCN  <  0.10 M HClO  <  0.10 M HNO₂  < 0.10 M HNO₃

Explanation:

We are comparing acids with the same concentration. So what we have to do first is to determine if we have any strong acid and for the rest ( weak acids ) compare them by their Ka´s ( look for them in reference tables ) since we know the larger the Ka, the more Hydronium concentration will be in these solutions at the same concentration.

HNO₃ is a strong acid and will have the largest hydronium concentration.

HCN  Ka = 6.2 x 10⁻¹⁰

HNO₂ Ka = 4.0 x 10⁻⁴

HClO  Ka = 3.0 x 10⁻⁸

The ranking from smallest to largest hydronium concentration will then be:

0.10M HCN  <  0.10 M HClO  <  0.10 M HNO₂  < 0.10 M HNO₃

5 0
4 years ago
Include a map with points where neon can be found.
nalin [4]
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Also: "Neon is rare on Earth, found in the Earth's atmosphere at 1 part in 55,000, or 18.2 ppm by volume (this is about the same as the molecule or mole fraction), or 1 part in 79,000 of air by mass."

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5 0
4 years ago
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