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Gala2k [10]
3 years ago
6

PLATO QUESTION...

Chemistry
2 answers:
Alecsey [184]3 years ago
5 0
  1. Transferases: catalyze the movement of a functional group from one molecule to another. (*Transfer: move from one place to another)
  2. Isomerases:  catalyze structural changes in a molecule
  3. Ligases: catalyze reactions involving the joining of two substrates
  4. Oxidoreductases: catalyze reduction reactions

<em>Hope this helps!!!</em>

Kipish [7]3 years ago
3 0

<em>Transferases</em> - C) Catalyze the movement of a functional  group from one molecule to another

<em>Isomerases</em> - D) Catalyze structural changes in a molecule

<em>Ligases</em> - B) Catalyze reactions involving the joining  of two substrates

<em>Oxidoreductases</em> - A) Catalyze reduction reactions

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Explanation : Given,

Boiling point of elevation constant (K_b) for water = 0.512^oC/m

Mass of water (solvent) = Density\times Volume=1.00g/mL\times 26.63mL=26.63g=0.02663kg

Molar mass of CaCl_2 = 110.98 g/mole

Formula used :  

\Delta T_b=i\times K_b\times m\\\\\Delta T_b=i\times K_b\times\frac{\text{Mass of }CaCl_2}{\text{Molar mass of }CaCl_2\times \text{Mass of water in kg}}

where,

\Delta T_b = change in boiling point  = 1.00^oC

i = Van't Hoff factor = 3 (for electrolyte)

K_b = boiling point constant for water

m = molality

Now put all the given values in this formula, we get

1.00^oC=3\times (0.512^oC/m)\times \frac{\text{Mass of }CaCl_2}{110.98g/mol\times 0.02663kg}

\text{Mass of }CaCl_2=1.92g

Therefore, the mass of calcium chloride (in g) needed is, 1.92 grams.

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