If we examine after 3 days, there will be a decrease in the concentration of NaCl and a decrease in the water level.
<u>Explanation:</u>
- If we inspect the following 3 days, there'll be a reduction inside the convergence of NaCl and a lessening inside the water level. This focus is diminished in 2 different ways, by expanding the solute or diminishing the water.
- Expanding the solute will build the arrangement's focus. This should be possible by just including a greater amount of your compound into the arrangement and dissolving it. It may not help in case you're utilizing a watery arrangement that is as of now disintegrated in water.
You can utilize a procedure called dialysis to diminish the water in an solution.
- Spot your answer in a dialysis pack that is shaped of semipermeable substance. Presently place the pack in an answer which has a high grouping of a particle. Accordingly, water will be kept concealed separately from the pack through the semi-penetrable film by hurrying out of the sack to the arrangement.
The circumstances when scientists use observational research and opinion based research is when they include animals or things that cannot control for a product. Observational research is a type of research which only observes ongoing behavior and studies about it and the results only rely on the behavior observed.
<u>Answer:</u> The number of moles of disulfur decafluoride is 
<u>Explanation:</u>
We are given:
Number of disulfur decafluoride molecules = 
According to mole concept:
number of molecules are contained in 1 mole of a compound.
So,
number of molecules will be contained in =
of disulfur decafluoride.
Hence, the number of moles of disulfur decafluoride is 
Answer:
450. g of 0.173 % KCN solution contains 779 mg of KCN.
Explanation:
Mass of the solution = m
Mass of the KCN in solution = 779 mg
Mass by mass percentage of KCN solution = 0.173%



1 mg = 0.001 g
m = 450,289 mg × 0.001 g = 450.289 mg ≈ 450. g
450. g of 0.173 % KCN solution contains 779 mg of KCN.
<span>Boyle's Law is k = PV so
Initial k = 13.0 L x 4.0 atm = 52 L atm
Final kf = 6.5 L x 8 atm = 52 L atm
The gas obeys Boyle's Law
The answer with two significant figures separated by a comma is k = 52, kf = 52.</span>