What is the mass, in grams, of each elemental sample? c. 43.9 mol Xe

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Determine the molar mass of xenon (Xe) by referring to the periodic table. The molar mass is the mass of one mole of xenon atoms, typically expressed in grams per mole (g/mol).

Use the given amount of substance in moles for xenon, which is 43.9 mol.

Apply the formula for calculating mass from the number of moles and molar mass: \( \text{Mass} = \text{Moles} \times \text{Molar Mass} \).

Substitute the values into the formula: \( \text{Mass} = 43.9 \, \text{mol} \times \text{Molar Mass of Xe} \, \text{g/mol} \).

Calculate the product to find the mass of xenon in grams.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Molar Mass

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). For example, xenon (Xe) has a molar mass of approximately 131.29 g/mol. This value is crucial for converting between moles and grams, allowing us to determine the mass of a given number of moles of an element.

Conversion Between Moles and Grams

To find the mass of a substance in grams from moles, the formula used is: mass (g) = moles × molar mass (g/mol). This relationship is fundamental in stoichiometry, enabling chemists to quantify substances in chemical reactions and calculations accurately.

Stoichiometry

Stoichiometry is the area of chemistry that deals with the quantitative relationships between the reactants and products in a chemical reaction. It allows for the calculation of how much of each substance is involved in a reaction, based on the balanced chemical equation and the molar ratios of the substances.

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