Question

Determine the number of moles of the compound and determine the number of moles of each type of atom in each of the following.

(a)
2.10 g of potassium chloride, KCl
compound WebAssign will check your answer for the correct number of significant figures.
Incorrect: Your answer is incorrect.
mol
K WebAssign will check your answer for the correct number of significant figures.
Incorrect: Your answer is incorrect.
mol
Cl WebAssign will check your answer for the correct number of significant figures.
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mol

Answer 1

To determine the number of moles of the compound potassium chloride (KCl) and the number of moles of each type of atom (potassium and chlorine), we can use the molar mass and the given mass of the compound.

The molar mass of potassium chloride (KCl) can be calculated by adding the atomic masses of potassium (K) and chlorine (Cl). The atomic mass of potassium is approximately 39.10 g/mol, and the atomic mass of chlorine is approximately 35.45 g/mol.

(a) Given:

Mass of KCl = 2.10 g

To calculate the number of moles of KCl:

Number of moles = Mass / Molar mass

Number of moles of KCl = 2.10 g / (39.10 g/mol + 35.45 g/mol)

To calculate the number of moles of potassium (K):

Number of moles of K = Number of moles of KCl × (1 mole of K / 1 mole of KCl)

To calculate the number of moles of chlorine (Cl):

Number of moles of Cl = Number of moles of KCl × (1 mole of Cl / 1 mole of KCl)

Please perform the calculations using the given mass and the atomic masses provided to find the number of moles for KCl, K, and Cl.