Answer:
The solubility of KNO₃ at 40° C is 1 mol/dm³
Explanation:
The solubility of a substance is the number of moles of that substance (solute) contained in a unit volume of solvent at that particular temperature.
Now, Solubility = n/V where n = number of moles of KNO₃ and V = volume of saturated solution = 50.0 cm³ = 0.05 dm³
n = m/M where m = mass of KNO₃ = 5.05 g and M = molar mass of KNO₃ = 101 g/mol
n = 5.05 g/101 g/mol = 0.05 mol
Solubility = n/V
= 0.05 mol/0.05 dm³
= 1 mol/dm³
So, the solubility of KNO₃ at 40° C is 1 mol/dm³
1 mole of NaCl contains 6.022×10^23 particles
∴. 922 moles of NaCl contains.... (multiplication of the 2 numbers)
Answer:its B
Explanation:
i have done this before! and i got 100 so i hope you got all the other questions right!
Answer:
C.
Explanation:
I believe C is the correct answer.
I am sorry i wish i could help you but i dont know the answer either.