The formula of determining the molarity is:
molarity =
-(1)
Volume of solution =
(given)
Since, 1 mL = 0.001 L
Therefore, volume of the solution = 0.22 L
Molarity = 0.194 M (given)
Substituting the values in formula (1)
![0.194 = \frac{moles of solute}{0.22}](https://tex.z-dn.net/?f=0.194%20%3D%20%5Cfrac%7Bmoles%20of%20solute%7D%7B0.22%7D)
![moles of solute= 0.22 L\times 0.194 mole/L = 0.0427 mole](https://tex.z-dn.net/?f=moles%20of%20solute%3D%200.22%20L%5Ctimes%200.194%20mole%2FL%20%3D%200.0427%20mole)
Now, number of moles =
-(2)
Molar mass of
= ![39.0983+54.938+4\times 15.99 = 158.0323 g/mol](https://tex.z-dn.net/?f=39.0983%2B54.938%2B4%5Ctimes%2015.99%20%3D%20158.0323%20g%2Fmol)
Substituting the value of number of moles and molar mass of
in equation -(2)
![0.0427 mole = \frac{mass}{158.0323 g/mole}](https://tex.z-dn.net/?f=0.0427%20mole%20%3D%20%5Cfrac%7Bmass%7D%7B158.0323%20g%2Fmole%7D)
![mass = 158.0323 g/mole\times 0.0427 mole = 6.748 g](https://tex.z-dn.net/?f=mass%20%3D%20158.0323%20g%2Fmole%5Ctimes%200.0427%20mole%20%3D%206.748%20g)
Hence, the mass in grams of potassium permanganate the chemist has added to the flask is
.
Answer:
1.
work out the mean mode median and range
Explanation:
If a large leak of refrigerant occurs such as from a filled cylinder in an enclosed area, the correct action that should be taken when no self-contained breathing apparatus is available would be to vacate the spill area and ventilate it. Leaving the area of the spill should be done as fast as possible to avoid suffocation of the refrigerant or other health effects like burns and irritations. Also, diluting it with air or ventilating it would make it less harmful to the people affected by the spill as it would be less harmful than being in its concentrated form.