How many moles of potassium are in 117.3 g?

The number of moles of potassium is .

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:

The formula to calculate number of moles of potassium is as follows:

  ......(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.

Hence, the number of moles of potassium in 117.3 g is 3 mol.

Learn more:

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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.

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explanation:

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"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"