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zaharov [31]
3 years ago
7

How many moles are there in 200 grams of CI?

Chemistry
2 answers:
ikadub [295]3 years ago
7 0
There are approximately 70.906
vekshin13 years ago
7 0
Formula for moles to grams is n=m/mm; moles is= mass divided by molar mass. molar mass if found under the chemical symbol of the chemical in the periodic table. For chlorine the molar mass is 35.453. so you would do 200/35.453 to get the moles which is 5.64 moles. however i would double check if the chemical is Cl or Cl2 because if chlorine is in its gas phase it usually diatomic (Cl2) in which case you wouldd just double the moles mass
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When HClO2 is dissolved in water, it partially dissociates according to the equation
Natasha_Volkova [10]

Answer:

x = 100 * 1.1897 = 118.97 %, which is > 100 meaning that all of the HClO2 dissociates

Explanation:

Recall that , depression present in freezing point is calculated with the formulae = solute particles Molarity x KF

0.3473 = m * 1.86

Solving, m = 0.187 m

Moles of HClO2 = mass / molar mass = 5.85 / 68.5 = 0.0854 mol

Molality = moles / mass of water in kg = 0.0854 / 1 = 0.0854 m

Initial molality

Assuming that a % x of the solute dissociates, we have the ICE table:

                 HClO2         H+    +   ClO2-

initial concentration:       0.0854                    0             0

final concentration:      0.0854(1-x/100)   0.0854x/100   0.0854x / 100

We see that sum of molality of equilibrium mixture = freezing point molality

0.0854( 1 - x/100 + x/100 + x/100) = 0.187

2.1897 = 1 + x / 100

x = 100 * 1.1897 = 118.97 %, which is > 100 meaning that all of the HClO2 dissociates

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