A2.450×10−2 m solution of nacl in water is at 20.0∘c. the sample was created by dissolving a sample of nacl in water and then bringing the volume up to 1.000 l. it was determined that the volume of water needed to do this was 999.3 ml . the density of water at 20.0∘c is 0.9982 g/ml. part a calculate the molality of the salt solution. express your answer to four significant figures and include the appropriate units.

Answer : The molality of the given solution is 0.02453 mole/kg.

Solution :

First we have to calculate the mass of NaCl (solute).

Now we have to calculate the mass of water (solvent).

Mass of the water (solvent) = 997.5 g

Now we have to calculate the molality of solution.

Therefore, the molality of the given solution is 0.02453 mole/kg.

a) the particles of the chair are strongly held together.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).