Answer:
Explanation:
A solid, at a given temperature, has a definite volume
and shape which may be affected by changes in
temperature. Solids usually increase slightly in size
when heated (expansion) and usually
decrease in size if cooled (contraction).A liquid, at a given temperature, has a
fixed volume and will take up the shape of any
container into which it is poured. Like a solid, a
liquid’s volume is slightly affected by changes in
temperature.
A gas, at a given temperature, has neither a definite
shape nor a definite volume. It will take up the shape
of any container into which it is placed and will
spread out evenly within it. Unlike those of solids
and liquids, the volumes of gases are affected quite
markedly by changes in temperature.
To solve this we use the
equation,
M1V1 = M2V2
where M1 is the concentration of the stock solution, V1 is the
volume of the stock solution, M2 is the concentration of the new solution and
V2 is its volume.
We prepare the solution by measuring 25 mL of the stock solution in a graduated cylinder or by using a pipette. Then, put the stock solution in a 100mL of volumetric flask. Dilute it by adding distilled water up to the 100mL mark in the flask. It should be noted that the lower meniscus of the solution should be the point where you observe the volume.
The answer is A. An electrolytic cell is by definition a non-spontaneous chemical reaction that uses something like a battery to power it. The spontaneous counterpart is the voltaic cell.
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Answer:
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Answer:
0.178 M
Explanation:
First we <u>determine the molar mass of NaOH</u>, using the <em>given molar masses </em>of the elements:
- Molar Mass of NaOH = Molar Mass of Na + Molar Mass of O + Molar Mass of H
- Molar Mass of NaOH = 40 g/mol
Then we<u> convert 5.000 grams of NaOH into moles</u>, using its <em>molar mass</em>:
- 5.000 g ÷ 40 g/mol = 0.125 mol
Now we <u>convert 700.0 mL into L</u>:
- 700.0 mL / 1000 = 0.700 L
Finally we <u>calculate the molarity of the solution</u>:
- Molarity = moles / liters
- 0.125 mol / 0.700 L = 0.178 M
