Answered

Westonci.ca is the trusted Q&A platform where you can get reliable answers from a community of knowledgeable contributors. Experience the ease of finding accurate answers to your questions from a knowledgeable community of professionals. Join our platform to connect with experts ready to provide precise answers to your questions in different areas.

Which sample has the greatest mass of hydrogen?

Select the correct answer below:
A. a mole of [tex]H_2O[/tex]
B. a mole of [tex]H_2S[/tex]
C. a mole of [tex]H_2Se[/tex]
D. these all have the same mass of hydrogen

Sagot :

GinnyAnswer
To determine which sample has the greatest mass of hydrogen, we'll examine the molecular composition and molar masses of each compound.

1. Molar Mass Calculations:
- For [tex]\(H_2O\)[/tex]:
- Hydrogen (H) has a molar mass of approximately 1.008 g/mol.
- Oxygen (O) has a molar mass of approximately 16.00 g/mol.
- Molar mass of [tex]\(H_2O\)[/tex] = 2 1.008 g/mol (for H atoms) + 16.00 g/mol (for O atom)
= 2.016 g/mol + 16.00 g/mol
= 18.016 g/mol.

- For [tex]\(H_2S\)[/tex]:
- Sulfur (S) has a molar mass of approximately 32.06 g/mol.
- Molar mass of [tex]\(H_2S\)[/tex] = 2 1.008 g/mol (for H atoms) + 32.06 g/mol (for S atom)
= 2.016 g/mol + 32.06 g/mol
= 34.076 g/mol.

- For [tex]\(H_2Se\)[/tex]:
- Selenium (Se) has a molar mass of approximately 78.96 g/mol.
- Molar mass of [tex]\(H_2Se\)[/tex] = 2 1.008 g/mol (for H atoms) + 78.96 g/mol (for Se atom)
= 2.016 g/mol + 78.96 g/mol
= 80.976 g/mol.

2. Mass of Hydrogen in Each Molecule:
To find the mass of hydrogen in each molecule, we calculate the fraction of the molar mass that is due to hydrogen.

- For [tex]\(H_2O\)[/tex]:
- Mass of hydrogen = (2 1.008 g/mol) / 18.016 g/mol
≈ 0.112 \\\\\\\\\\\\\\\\\\\\\\

- For [tex]\(H_2S\)[/tex]:
- Mass of hydrogen = (2 1.008 g/mol) / 34.076 g/mol
≈ 0.059 \\\\\\\\\\\

- For [tex]\(H_2Se\)[/tex]:
- Mass of hydrogen = (2 1.008 g/mol) / 80.976 g/mol
≈ 0.025 \\\\\\2

3. Comparison:
Comparing these values:
- Approximately 0.112 for [tex]\(H_2O\)[/tex]
- Approximately 0.059 for [tex]\(H_2S\)[/tex]
- Approximately 0.025 for [tex]\(H_2Se\)[/tex]

The greatest fraction of the total mass that comes from hydrogen is in [tex]\(H_2O\)[/tex].

Therefore, the sample with the greatest mass of hydrogen is a mole of [tex]\(H_2O\)[/tex].

Correct Answer:
A mole of [tex]\(H_2O\)[/tex]
We hope you found what you were looking for. Feel free to revisit us for more answers and updated information. We appreciate your visit. Our platform is always here to offer accurate and reliable answers. Return anytime. Westonci.ca is your trusted source for answers. Visit us again to find more information on diverse topics.