Textbook Question
The ratio of oxygen to carbon by mass in carbon monoxide is 1.33:1.00. Find the formula of an oxide of carbon in which the ratio by mass of oxygen to carbon is 2.00:1.00.
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Ch.2 - Atoms & Elements
Tro4th EditionChemistry: A Molecular ApproachISBN: 9780134112831
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Table of contents
- Ch.1 - Matter, Measurement & Problem Solving136
- Ch.2 - Atoms & Elements112
- Ch.3 - Molecules, Compounds & Chemical Equations159
- Ch.4 - Chemical Quantities & Aqueous Reactions140
- Ch.5 - Gases118
- Ch.6 - Thermochemistry106
- Ch.7 - Quantum-Mechanical Model of the Atom62
- Ch.8 - Periodic Properties of the Elements103
- Ch.9 - Chemical Bonding I: The Lewis Model104
- Ch.10 - Chemical Bonding II: Molecular Shapes & Valence Bond Theory89
- Ch.11 - Liquids, Solids & Intermolecular Forces73
- Ch.12 - Solids and Modern Material59
- Ch.13 - Solutions110
- Ch.14 - Chemical Kinetics140
- Ch.15 - Chemical Equilibrium78
- Ch.16 - Acids and Bases155
- Ch.17 - Aqueous Ionic Equilibrium176
- Ch.18 - Free Energy and Thermodynamics108
- Ch.19 - Electrochemistry118
- Ch.20 - Radioactivity and Nuclear Chemistry82
- Ch.21 - Organic Chemistry150
Chapter 2, Problem 95
A 7.83 g sample of HCN contains 0.290 g of H and 4.06 g of N. Find the mass of carbon in a sample of HCN with a mass of 3.37 g.
Verified step by step guidance1
Determine the total mass of the original sample of HCN, which is given as 7.83 g.
Calculate the mass of carbon in the original sample by subtracting the mass of hydrogen (0.290 g) and nitrogen (4.06 g) from the total mass of the sample.
Find the fraction of carbon in the original sample by dividing the mass of carbon by the total mass of the sample.
Use the fraction of carbon to determine the mass of carbon in the new sample by multiplying this fraction by the mass of the new sample, which is 3.37 g.
This result gives you the mass of carbon in the 3.37 g sample of HCN.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Molar Mass and Composition
Understanding the molar mass of compounds is essential in stoichiometry. HCN consists of hydrogen (H), carbon (C), and nitrogen (N), and knowing the mass contributions of each element allows for calculations of their proportions in different sample sizes.
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Mass Percent Composition
Mass percent composition is the percentage by mass of each element in a compound. It is calculated by dividing the mass of the element by the total mass of the compound and multiplying by 100. This concept is crucial for determining the mass of carbon in a different sample size based on the known composition.
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Proportional Relationships
Proportional relationships allow us to scale the mass of an element from one sample size to another. By establishing the ratio of the mass of carbon in the original sample to the total mass, we can apply this ratio to find the mass of carbon in a new sample size, maintaining the same composition.
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03:32Law of Multiple Proportions
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Textbook Question
The ratio of the mass of a nitrogen atom to the mass of an atom of 12C is 7:6, and the ratio of the mass of nitrogen to oxygen in N2O is 7:4. Find the mass of 1 mol of oxygen atoms.
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