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What would you need to do to calculate the molality of 10 g of NaCl in 2 kg of water?A.Convert the 10 g of NaCl to kg of NaCl.B.Convert the 2 kg of water to liters of water.C.Convert the 2 kg of water to moles of water.D.Convert the 10 g of NaCl to moles of NaCl.SUBMITarrow_backPREVIOUS

Question

What would you need to do to calculate the molality of 10 g of NaCl in 2 kg of water?A.Convert the 10 g of NaCl to kg of NaCl.B.Convert the 2 kg of water to liters of water.C.Convert the 2 kg of water to moles of water.D.Convert the 10 g of NaCl to moles of NaCl.SUBMITarrow_backPREVIOUS

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Solution

To calculate the molality of 10 g of NaCl in 2 kg of water, you would need to follow these steps:

  1. Convert the 10 g of NaCl to moles of NaCl. The molar mass of NaCl is approximately 58.44 g/mol. So, you would divide 10 g by 58.44 g/mol to get the number of moles of NaCl.

  2. Molality is defined as the number of moles of solute (in this case, NaCl) per kilogram of solvent (in this case, water). Since the mass of water is already given in kilograms, there is no need to convert it.

  3. Divide the number of moles of NaCl by the mass of water in kilograms. The result is the molality of the NaCl solution.

Note: There is no need to convert the mass of water to liters or to calculate the number of moles of water for this calculation. Molality is based on the mass of the solvent, not its volume or the number of moles.

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