Answer:
B. honey dissolving in tea
Explanation:
Answer:
To find volume you can either look at the displacement of the water or Length•Width•Height
Explanation:
11) 12
12) 340 mL
13) 196 m\
The equation is:
NH₃ + H₂O ↔ NH₄⁺ + OH⁻
base acid conj. acid conj. base
NH₃ is the proton acceptor so it considered as Bronsted-Lowry base and H₂O is proton donor so it considered as Bronsted-Lowry acid
NH₃ when accepted H⁺ it converted into NH₄⁺ (conjugate acid) and H₂O when losing H⁺ it converted into OH⁻ (conjugate base)
The question asks for acid and base
1) OH⁻ base, H₂O acid
2) H₂O acid, OH⁻ base
3) H₂O acid , NH₄⁺ acid
4) OH⁻ base, NH₄⁺ acid
5) NH₃ base, H₂O acid
so the correct answer is 2) because it is the only one containing acid then base
Answer: 170.9 g
Explanation:
1) Balanced chemical equation:
Fe₂O₃(s) + 6 H₂C₂O₄ (aq) → 2Fe(C₂O₄)₃³⁻ + 3H₂O + 6H⁺(aq)
2) mole ratio:
1mol Fe₂O₃ : 6 mol H₂C₂O₄
3) number of moles of H₂C₂O₄ in the solution
M = n / V ⇒ n = MV = 0.800M × 0.800 liter = 6.40 moles
4) Porportionality
1mol Fe₂O₃ / 6 mol H₂C₂O₄ = x / 6.40 mol H₂C₂O₄
⇒ x = 1.07 mol Fe₂O₃
5) Convert 1.07 mol Fe₂O₃ to grams.
molar mass Fe₂O₃ = 159.69 g/mol
mass in grams = molaer mass × number of moles
mass in grams = 159.69 g/mol × 1.07 mol = 170.9 g
I believe the correct answer from the choices listed above is option A. The E+ of the cell would be 2.47 V. E of the cell is given by the formula E(cathode) - E(anode) . <span>So in this case the first half cell reaction is the reaction that takes place in the cathode and the second one takes place in the anode.</span>
