Practice: A 7.74 g sample of HCN is found to contain 0.287 g of H and 4.01 g N. Find the mass of carbon in a sample of HCN with a mass of 3.43 g.
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The Atom | 10 mins | 0 completed | Learn |
Subatomic Particles | 17 mins | 0 completed | Learn |
Isotopes | 17 mins | 0 completed | Learn Summary |
Ions | 28 mins | 0 completed | Learn |
Atomic Mass | 23 mins | 0 completed | Learn |
Periodic Table: Classifications | 11 mins | 0 completed | Learn |
Periodic Table: Group Names | 9 mins | 0 completed | Learn |
Periodic Table: Representative Elements & Transition Metals | 7 mins | 0 completed | Learn |
Periodic Table: Element Symbols | 7 mins | 0 completed | Learn |
Periodic Table: Elemental Forms | 6 mins | 0 completed | Learn |
Periodic Table: Phases | 9 mins | 0 completed | Learn |
Periodic Table: Charges | 20 mins | 0 completed | Learn |
Calculating Molar Mass | 10 mins | 0 completed | Learn |
Mole Concept | 38 mins | 0 completed | Learn Summary |
Law of Conservation of Mass | 6 mins | 0 completed | Learn |
Law of Definite Proportions | 10 mins | 0 completed | Learn |
Atomic Theory | 10 mins | 0 completed | Learn |
Law of Multiple Proportions | 6 mins | 0 completed | Learn |
Millikan Oil Drop Experiment | 9 mins | 0 completed | Learn |
Rutherford Gold Foil Experiment | 10 mins | 0 completed | Learn |
Additional Practice |
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Thomson's Cathode Ray Tube Experiment |
The Chadwick Neutron Experiment |
Mass Spectrometry |
Additional Guides |
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Periodic table Charges (ignore) |
Calculating Molar Mass (ignore) |
Calculating Grams to Moles |
"Different samples of a pure chemical compound always contain the same proportions of elements by mass."
Example #1: Two unknown compounds are examined. Compound A contains 2.0 grams of hydrogen and 32.0 grams of oxygen. Compound B contains 15.0 grams of hydrogen and 120.0 grams of oxygen. Do Compounds A and B represent the same compound?
Example #2: A compound contains only calcium and fluorine. A sample of the compound is determined to contain 2.00 g of calcium and 1.90 g of fluorine. According to the Law of Definite Proportions, how much calcium should another sample of this compound contain if it possesses 2.85 g of fluorine?
Practice: A 7.74 g sample of HCN is found to contain 0.287 g of H and 4.01 g N. Find the mass of carbon in a sample of HCN with a mass of 3.43 g.
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