Respuesta :
The number of moles of potassium is [tex]\boxed{{\text{3 mol}}}[/tex].
Further Explanation:
Mole is the S.I. unit. The number of moles is calculated as the ratio of mass of the compound to that of molar mass of the compound.
Molar mass also known as molecular weight is the sum of the total mass in grams of all the atoms that make up a mole of a particular molecule that is the mass of 1 mole of a compound. Its S.I unit is g/mol.
The expression to relate number of moles, mass and molar mass of compound is as follows:
[tex]{\text{Number of moles}}=\dfrac{{{\text{mass of the compound}}}}{{{\text{molar mass of the compound}}}}[/tex]
The formula to calculate number of moles of potassium is as follows:
[tex]{\text{Number of moles of potassium}}=\dfrac{{{\text{Given mass of potassium}}}}{{{\text{molar mass of potassium}}}}[/tex] ......(1)
The given mass of potassium is 117.3 g.
Molar mass of potassium is 39.0983 g/mol.
Substitute 117.3 g for given mass of potassium and 39.0983 g/mol for molar mass of potassium in equation (1) to calculate the number of moles of potassium.
[tex]\begin{aligned}{\text{Number of moles of potassium}}&=\frac{{{\text{117}}{\text{.3 g}}}}{{{\text{39}}{\text{.0983 g/mol}}}}\\&= {\text{3}}{\text{.0001 mol}}\\&\approx{\text{3}}\;{\text{mol}}\\\end{aligned}[/tex]
Hence, the number of moles of potassium in 117.3 g is 3 mol.
Learn more:
1. Balanced the chemical equationhttps://brainly.com/question/11200282
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Answer details:
Grade: High School
Subject: Chemistry
Chapter: Mole concept
Keywords: Potassium, number of moles, molar mass, compound, ratio, mass, 117.3 grams, 39.0983 g/mol, 3.0001 mol, and 3 mol.
