<u>Answer:</u> Van't Hoff factor, i is <u>less</u> than expected from the formula of the compound and this <u>decreases</u> the effective concentration of particles.
<u>Explanation:</u>
Strong electrolytes are defined as the solutions which completely dissociate into their ions.
But, most of the strong electrolytes do not dissociate completely (act ideally) but remain partially undissociated into the ions. Thus, giving a lesser number of ions in the solution than expected.
This means that the Van't Hoff factor, <em>i</em> which denotes the number of ions is <u>less</u> than expected.
As fewer ions are released in the solution, the concentration of the solution is expected to <u>decrease</u>.
Hence, van't Hoff factor, i is <u>less</u> than expected from the formula of the compound and this <u>decreases</u> the effective concentration of particles.
When the student crushes sugar there there occurs an increase in the number of molecules or particles of sugar. This means that now more number of sugar particles (solute) are able to interact with water (solvent).
Therefore, there will be more number of collisions taking place between the solute and solvent molecules.
As a result, sugar will dissolve readily into water as there is an increase in interaction between solute and solvent particles.
Thus, we can conclude that when he crushes the sugar and then stirs it into the water then it will work as this leads to more interaction or collisions between the solute and solvent particles.
Answer:
Answer is C atoms of different elements are the same
Answer:
k = 6.31 x 10⁻³ min⁻¹
Explanation:
The equation required to solve this question is:
k = 0693 / t half-life
This equation is derived from the the equation from the radioctive first order reactions:
ln At/A₀ = -kt
where At is the number of isoopes after a time t , and A₀ is the number of of isotopes initially. The half-life is when the number of isotopes has decayed by a half, so
ln(1/2) = -kt half-life
-0.693 = - k t half-life
t half-life = 109.8 min
⇒ k = 0.693 / t half-life = 0.693 / 109.8 min = 6.31 x 10⁻³ min⁻¹