Question

State the number of moles in 1kg of NaCl.

A) 0.5 moles
B) 1 mole
C) 2 moles
D) 3 moles

Answer 1

The provided information appears to contain an error. To find the moles in 1kg of NaCl, divide 1,000 grams by the molar mass of NaCl (58.44 g/mol) for the correct value, which is approximately 17.1 moles, not reflected in the options provided.

Step-by-step explanation:

To determine the number of moles in 1kg of NaCl, we need to perform two steps:

1. First, convert 1kg (1,000 grams) of NaCl to moles using the molar mass of NaCl (58.44 g/mol) as the unit conversion factor. This results in a significantly higher number of moles than 0.072 mol NaCl
2. Second, if we were to determine the number of moles of ions for NaCl, we use the conversion factor that in 1 mole of NaCl, there are 2 moles of ions. However, this is not directly applicable to the question asked.

The provided information seems incorrect for a conversion of 1kg of NaCl, as it would result in a molar quantity much larger than 0.072. The correct calculation would be to divide 1,000 grams by the molar mass of NaCl (58.44 g/mol), giving us approximately 17.1 moles of NaCl. None of the options provided (A to D) match this correct result.