Glycine, an amino acid used by organisms to make proteins, is represented by the following molecular model. (c) Calculate how many moles of glycine are in a 100.0-g sample of glycine.

검증된 단계별 안내

Determine the molar mass of glycine by adding the atomic masses of each element in the molecular formula of glycine, C2H5NO2. Use the periodic table for accurate atomic masses.

Convert the mass of glycine from grams to moles using the formula: \( \text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}} \).

Substitute the given mass of glycine (100.0 g) into the formula.

Perform the division to calculate the number of moles of glycine.

Ensure the units are correct, the final answer should be in moles.

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주요 개념

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Molar Mass

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). For glycine, the molar mass can be calculated by summing the atomic masses of its constituent elements: carbon, hydrogen, nitrogen, and oxygen. This value is essential for converting between grams and moles in stoichiometric calculations.

Mole Concept

The mole is a fundamental unit in chemistry that quantifies the amount of substance. One mole contains approximately 6.022 x 10²³ entities, such as atoms or molecules. Understanding the mole concept allows chemists to relate mass to the number of particles, facilitating calculations involving chemical reactions and compositions.

Stoichiometry

Stoichiometry is the area of chemistry that deals with the relationships between the quantities of reactants and products in chemical reactions. It involves using balanced chemical equations to calculate the amounts of substances consumed and produced. In this context, stoichiometry helps determine how many moles of glycine are present in a given mass, which is crucial for understanding its role in biological processes.