Answer:
Melting occurs when a solid is heated and turns to liquid. The particles in a solid gain enough energy to overcome the bonding forces holding them firmly in place. Typically, during melting, the particles start to move about, staying close to their neighboring particles, then move more freely.
Explanation:
<span>Which part of the electromagnetic spectrum has a higher frequency than ultraviolet light? </span>B. Gamma Rays.
Answer is in a photo. I can only upload it to a file hosting service. link below!
bit.ly/3a8Nt8n
Answer: Use Avogadro's number, NA = 6.02 × 1023 atoms/mol.
Explanation:
Answer:
pH = 4.78
Explanation:
<em>There are titrated 65.8mL of a 0.7600M of acetic acid</em>
The reaction of acetic acid, CH₃COOH, with NaOH is:
CH₃COOH + NaOH → CH₃COONa + H₂O
Initial moles of acetic acid are:
0.0658L ₓ (0.7600mol / L) = 0.05000 moles of CH₃COOH
Moles of NaOH added to the acid solution are:
0.0784L ₓ (0.3500mol / L) = 0.02744 moles of NaOH = Moles of CH₃COONa produced -<em>Because NaOH is the limiting reactant-</em>
That means after the reaction moles of CH₃COOH and moles of CH₃COONa are:
CH₃COOH: 0.05000 mol - 0.02744 mol = 0.02256 moles
CH₃COONa: 0.02744 moles
Using H-H equation for acetic acid, pH of the solution is:
pH = 4.70 + log₁₀ [CH₃COONa] / [CH₃COOH]
Replacing:
pH = 4.70 + log₁₀ [0.02744] / [0.02256]
<h3>pH = 4.78</h3>