Question

Prove that -sin( alpha + 270°)

Answer 1

Answer:

0.0308×111=3.42 g.

Step-by-step explanation:

According to Van't Hoff's equation, the osmotic pressure 

Π=iCRT=VinBRT.

Here, i is the Van't Hoff's factor, C is the molar concentration, R is the ideal gas constant, T is temperature, nB is the number of moles of calcium chloride and V is the volume of the solution.

Now we have given below values:

π =  0.75 atm

V = 2.5L

i = 2.47

T = (27+273) K = 300K

and R = 0.0821L atm k−1 mol−1

0.75=2.52.47×nB×0.0821×300

nB=0.0308 mol

The molar mass of calcium chloride is 111 g/mol.

Amount of calcium chloride dissolved =0.0308×111=3.42 g.

I Hope this answer is right