In these atoms, the positive and negative charges cancel each other out, leading to an atom with no net charge.
(Protons, neutrons, and electrons)
Answer: see the photo attached. (:
Answer:
moles solute = 25.5 / molar mass
moles solute /0.1 Kg = molality
delta T = molality x 1.86
freezing point = 0°C - delta T
Answer:
pH = 9.25
Explanation:
Reaction of ammonia (NH₃) with hydrochloric acid (HCl) is:
NH₃ + HCl → NH₄⁺ + Cl⁻
As equal volumes of a 0.020M solution of NH₃ and a 0.010M solution of react, molarity of NH₃ after reaction is 0.010M and 0.010M of NH₄⁺.
For the buffer NH₄⁺/NH₃ H-H equation to find pH of solution is:
pH = pKa + log₁₀ [NH₃] / [NH₄⁺]
pH = 9.25 + log₁₀ [0.010M] / [0.010M]
<em>pH = 9.25</em>
Answer:
D. O – H
Explanation:
- The electronegativity of the elements in the question is:
<em>H (2.20), S (2.58), Cl (3.16), N (3.04), O (3.44), and C (2.55).</em>
- Since, the H atom has the lowest electronegativity (2.20) and O atom has the highest electronegativity (3.44).
- <em>So, O - H pair of atoms has the highest electronegativity difference.</em>