Answer: The volume of the solution be if it is diluted to 10% (v/v) is 6.0 L
Explanation:
According to the dilution law,
where,
= concentration of pure acid solution = 15 %
= volume of pure acid solution = 4.0 L
= concentration of diluted acid solution= 10%
= volume of diluted acid solution= ?
Putting in the values we get:
Thus the volume of the solution be if it is diluted to 10% (v/v) is 6.0 L
Answer:
Option a: positron emission.
Explanation:
In the transformation we have:
⁶⁷Ga → ⁶⁷Zn
The reaction is:
For Ga to become Zn, the atom nucleus has to lose a proton, so in the given options, the reaction that involves the transformation of a proton is the option a, positron emission.
In a positron emission, a proton becomes into a neutron and a positron:
Therefore, the correct answer is option a: positron emission.
I hope it helps you!
a. pH=2.07
b. pH=3
c. pH=8
<h3>Further explanation</h3>pH=-log [H⁺]
a) 0.1 M HF Ka = 7.2 x 10⁻⁴
HF= weak acid
b) 1 x 10⁻³ M HNO₃
HNO₃ = strong acid
c) 1 x 10⁻⁸ M HCl