Answer:
Hello, Im Mack. Hope you're doing well. :)
Here is my Correct, custom answer for the lab Question, (I also took the same assignment and got a 100% score)
Explanation:
The heating of the sodium acetate solution made it change from super-saturated to un-saturated. Yet now that it cooled back to room temperature Im sure it is saturated. it wasn't able to disolve the excess sodium acetate left over at room temperature and had to be heated so now that it is back to room temperature I Think it will not disolve the sodium acetate left in the solution until it is heated again.
Hope this helped you out,
Please feel free to comment for further help, and I'll reply asap.
<u>Have a great day my friend :)</u>
Answer:
Molarity = 0.74 M
Explanation:
Given data:
Molar concentration of solution = ?
Mass of NaCl = 37.1 g
Volume of water = 0.850 L
Molar mass of NaCl = 58.44 g/mol
Solution:
Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
Formula:
Molarity = number of moles of solute / L of solution
Number of moles of NaCl:
Number of moles = mass/ molar mass
Number of moles = 37.1 g /58.44 g/mol
Number of moles = 0.63 mol
Molarity = 0.63 mol / 0.850 L
Molarity = 0.74 M
The answer is "...one kilogram of a 2.5% KI solution would contain 25 grams of KI."
Explanation:
A 2.5% by mass potassium iodide KI solution is equal to 2.5 grams of KI divided by 100 grams of the KI solution and then multiply by 100, that is
2.5% by mass = [2.5grams KI / (100grams KI solution)] *100
We multiply the mass of the solute and the mass of the solution by 10 each so that 100 grams becomes 1000 grams.
2.5% by mass = [(2.5grams KI * 10) / (100grams KI solution * 10)] *100 = (25grams KI / 1000grams KI solution) *100
Since 1000 grams is equal to 1 kg, the expression becomes
2.5% by mass = (25grams KI/1kg KI solution) *100
The expression above shows that a 2.5% by mass KI solution would contain 25 grams of potassium iodide in 1 kilogram KI solution.
Answer:
Deserts are areas that receive very little precipitation. ... This rock's path was created when rainfall produced a shallow lake, which formed a thin layer of ice. ... One thing all deserts have in common is that they are arid, or dry. ... The temperature stays high even at night, making the city an “island” of heat in ..
Explanation: