The answer should be E.the total number of protons and neutrons in the nucleus
Percentage yield=(actual yield/theoretical yield) x 100%
= (45/50) x 100%
= 90%
Answer:
Explanation:
According to the experiment, the very nucleus of the atom is conformed by protons and neutrons, whereas electrons are diminute and have low mass in comparisson to protons and neutrons. So then, the nucleus accounts for the size and the mass of the atoms.
You need to give more explanation about it but if i understand a little abt what ur saying so i thinks it’s true
Answer:
pH = 5.19
Explanation:
Mixture of acetic acid with sodium acetate produce a buffer (Buffer is defined as the mixture of a weak acid with its conjugate base and vice versa). The pH of the buffer can be determined using Henderson-Hasselbalch equation:
pH = pKa + log₁₀ [A⁻] / [HA]
<em>Where pKa is -log Ka = 4.75; [A⁻] is the concentration of conjugate base (Acetate ion) and [HA] is molar concentration of the weak acid.</em>
-You can use moles of the compounds rather than its concentrations, that is:
[HA] = 0.147 moles
[A⁻] = 0.405 moles
Replacing in H-H equation:
pH = 4.75 + log₁₀ [0.405] / [0.147]
<h3>pH = 5.19</h3>
