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3 years ago

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

Please help I’m confused

chubhunter [2.5K]

Answer: i believe it’s the second one !

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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

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4 years ago

Include a map with points where neon can be found.

nalin [4]

Here is some information: "Neon is a chemical element with symbol Ne and atomic number 10. It is in group 18 of the periodic table. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air. It was discovered in 1898 as one of the three residual rare inert elements remaining in dry air, after nitrogen, oxygen, argon and carbon dioxide were removed. Neon was the second of these three rare gases to be discovered, and was immediately recognized as a new element from its bright red emission spectrum. The name neon is derived from the Greek word, νέον, neuter singular form of νέος, meaning new. Neon is chemically inert and forms no uncharged chemical compounds. The compounds of neon include ionic molecules, molecules held together by van der Waals forces and clathrates."

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."

Also I only found one if that is okay but here it is: It is the place where it is a city and most people find most neon there.

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4 years ago