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Answer :
The statement "The molar mass for potassium is 39.1 g/mole" is true. The statement "The molar mass of HCl is 36.51 g/mole" is false.
The statement "The molar mass for potassium is 39.1 g/mole" is true. The molar mass of an element is the mass of one mole of that element, and the molar mass of potassium is indeed approximately 39.1 g/mole.
The statement "The molar mass of HCl is 36.51 g/mole" is false. The molar mass of a compound is the sum of the molar masses of its constituent elements. The molar mass of hydrogen (H) is approximately 1.008 g/mole, and the molar mass of chlorine (Cl) is approximately 35.45 g/mole. Therefore, the molar mass of HCl can be calculated as follows:
Molar mass of HCl = Molar mass of H + Molar mass of Cl
= 1.008 g/mole + 35.45 g/mole
≈ 36.46 g/mole
So, the molar mass of HCl is approximately 36.46 g/mole, not 36.51 g/mole as stated in the statement. Therefore, the statement is false.
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