Calculate the mole fraction of nacl in a solution prepared by dissolving 117 g nacl in 1.11 kg h2o.

1.12 × 10-2

6.29 × 10-2

1.57 × 10-2

9.91 × 10-1

3.15 × 10-2

The mole fraction of NaCl in a solution prepared by dissolving 117 g of this in 1,11kg of water is 9.91 × 10-1

Explanation:

First of all you should know that:

Mole fraction solute = solute moles / solute moles + solvent moles

Mole fraction solvent = solvent moles / solute moles + solvent moles

and of course, you should know molar mass:

NaCl = 58,44 g/m

H2O = 18 g/m

For water you have 1, 11kg and you should convert to g for molar mass which is in g/m.

1,11kg * 1000 = 1110 g

1110 g / 18 g/m = 0,0162 moles

For NaCl you have 117 g, so the moles of solute are:

117 g / 58,44 g = 2,002 moles

Now, let's go to mole fraction solute.

solute moles / solute moles + solvent moles

2,002 moles / 2,002 moles + 0,0162 moles

2,002 moles / 2,0182 total moles = 0,991

the answer is c) gamma rays

hope i : )

mechanics (greek   is that area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment. the scientific discipline has its origins in ancient greece with the writings of aristotle and archimedes[1][2][3] (see history of classical mechanics and timeline of classical mechanics). during the early modern period, scientists such as galileo, kepler, and newton laid the foundation for what is now known as classical mechanics. it is a branch of classical physics that deals with particles that are either at rest or are moving with velocities significantly less than the speed of light. it can also be defined as a branch of science which deals with the motion of and forces on objects. the field is yet less widely understood in terms of quantum theory.

explanation: