Hello!
A solution of a weak base and its conjugate acid act as a better buffer than does a solution of a weak base alone because <span>A solution of a weak base alone has no acid present to absorb added base.</span>
If an acid (In this case HCl) is added to a buffer or a weak base solution, the following reaction happens:
HCl + A⁻ → HA + Cl⁻
In this way, the addition of acid is neutralized by the base.
If a base is added (In this case NaOH), only a solution of a weak base and its conjugate acid can react in the following way:
NaOH + HA → NaA + H₂O
So, a solution of only a weak base can resist the addition of acids but not bases, so it isn't a good buffer.
Have a nice day!
A(n) Acute exposure is a short term or brief exposure that may create an immediate health hazard. Answer: A)
The third launch ( with 300 N force) had the greatest acceleration of the tennis ball
<h3>Further explanation </h3>
Newton's 2nd law explains that the acceleration produced by the resultant force on an object is proportional and in line with the resultant force and inversely proportional to the mass of the object
∑F = m. a

F = force, N
m = mass = kg
a = acceleration due to gravity, m / s²
From the above equation it has been shown that the force acting on the object is directly proportional to its acceleration, so <em>the greater the force exerted on the object, the greater the acceleration of the object produced.</em>
6.02 x10^23 atom
3.5g x 1mol/63.55g Cu x 6.02 x 10^23/ 1mol=
3.32 x 10^22 atoms