Taking into account the definition of molarity, the concentration of the solution is 0.855
.
<h3>Definition of molarity</h3>
Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:
![Molarity=\frac{number of moles}{volume}](https://tex.z-dn.net/?f=Molarity%3D%5Cfrac%7Bnumber%20of%20moles%7D%7Bvolume%7D)
Molarity is expressed in units
.
<h3>Molarity of NaCl</h3>
In this case, you have:
- number of moles of NaCl=
1.71 moles (being 58.45 g/mole the molar mass of NaCl) - volume 2 L
Replacing in the definition of molarity:
![Molarity=\frac{1.71 moles}{2 L}](https://tex.z-dn.net/?f=Molarity%3D%5Cfrac%7B1.71%20moles%7D%7B2%20L%7D)
Solving:
Molarity= 0.855 ![\frac{moles}{liter}](https://tex.z-dn.net/?f=%5Cfrac%7Bmoles%7D%7Bliter%7D)
Finally, the concentration of the solution is 0.855
.
Learn more about molarity:
<u>brainly.com/question/9324116</u>
<u>brainly.com/question/10608366</u>
<u>brainly.com/question/7429224</u>
The primary condition for a reaction to reach dynamic equilibrium is that "rate of forward reaction must be equal to the rate of reverse reaction." Furthermore, in a state of dynamic equilibrium, it has a unique synthesis wherein reactants are converted to products and vice versa.
Answer:
35.29%
Explanation:
no. of questions in test = 34
no. of questions answered correctly = 22
therefore, no. of questions answered incorrectly = 34 - 22
= 12
error percentage = 12/34 * 100
= 35.29%
Answer:
The appropriate answer is "342 g/mol".
Explanation:
Given:
Freezing point,
= 0.93°C
Kf,
= 1.86°C/m
Mass,
= 171
As we know,
⇒ ![Freezing \ point = Kf\times molality](https://tex.z-dn.net/?f=Freezing%20%5C%20point%20%3D%20Kf%5Ctimes%20molality)
![0.93=1.86\times molality](https://tex.z-dn.net/?f=0.93%3D1.86%5Ctimes%20molality)
![Molality=\frac{0.93}{1.86}](https://tex.z-dn.net/?f=Molality%3D%5Cfrac%7B0.93%7D%7B1.86%7D)
![=0.5 \ m](https://tex.z-dn.net/?f=%3D0.5%20%5C%20m)
Now,
⇒ ![Molality=\frac{moles \ of \ sugar}{mass \ of \ water}](https://tex.z-dn.net/?f=Molality%3D%5Cfrac%7Bmoles%20%5C%20of%20%5C%20sugar%7D%7Bmass%20%5C%20of%20%5C%20water%7D)
![moles \ of \ sugar=0.0005 \ mol](https://tex.z-dn.net/?f=moles%20%5C%20of%20%5C%20sugar%3D0.0005%20%5C%20mol)
hence,
The molar mass of the sugar will be:
= ![\frac{mass}{moles}](https://tex.z-dn.net/?f=%5Cfrac%7Bmass%7D%7Bmoles%7D)
= ![\frac{171\times 10^{-3}}{0.0005}](https://tex.z-dn.net/?f=%5Cfrac%7B171%5Ctimes%2010%5E%7B-3%7D%7D%7B0.0005%7D)
= ![342 \ g/mol](https://tex.z-dn.net/?f=342%20%5C%20g%2Fmol)
It's 3/8 ths citric acid and it taste gross