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Ch.3 - Molecules and Compounds
Tro - Chemistry: A Molecular Approach 5th Edition
Tro5th EditionChemistry: A Molecular ApproachISBN: 9780134874371당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Tro 5th EditionCh.3 - Molecules and Compounds문제 96c
3장, 문제 96c

From the given molar mass and empirical formula of several compounds, find the molecular formula of each compound. c. C3H2N, 312.29 g/mol

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Determine the molar mass of the empirical formula C3H2N.
Calculate the empirical formula mass by adding the atomic masses of all atoms in C3H2N: 3(C) + 2(H) + 1(N).
Divide the given molar mass of the compound (312.29 g/mol) by the empirical formula mass to find the ratio.
Round the ratio to the nearest whole number to find the multiplier for the empirical formula.
Multiply the subscripts in the empirical formula C3H2N by the whole number ratio to obtain the molecular formula.

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주요 개념

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Empirical Formula

The empirical formula represents the simplest whole-number ratio of atoms of each element in a compound. It provides essential information about the composition of the compound but does not indicate the actual number of atoms present. For example, the empirical formula for glucose (C6H12O6) is CH2O, which shows the ratio of carbon, hydrogen, and oxygen.
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02:26
Empirical vs Molecular Formula

Molar Mass

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all the atoms in the molecular formula. In the context of finding a molecular formula, the molar mass helps determine how many times the empirical formula fits into the molecular formula based on the given total mass.
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가이드 코스
02:11
Molar Mass Concept

Molecular Formula

The molecular formula indicates the actual number of atoms of each element in a molecule of a compound. It can be derived from the empirical formula by multiplying the subscripts in the empirical formula by a whole number, which is determined by dividing the compound's molar mass by the molar mass of the empirical formula. This provides a complete picture of the compound's composition.
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가이드 코스
02:08
Determining Molecular Formulas
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