What is the molar enthalpy of reaction for synthesis of PCl5(s) from phosphorus and chlorine? 2P(s) + 5Cl2(g) → 2PCl5(s)

2P(s) + 3Cl2(g) → 2PCl3(s) ΔH = −574 kJ

2PCl5(s) → 2 PCl3(s) + 2Cl2(g) ΔH = +157 kJ

(a) 366 kJ (b) 417 kJ (c) 444 kJ (d) 888 kJ

City a and city b had two different temperatures on a particular day. on that day, four times the temperature of city a was 8â° c more than 3 times the temperature of city b. the temperature of city a minus twice the temperature of city b was â’3â° c. what was the temperature of city a and city b on that day? city a was 5â° c, and city b was 4â° c. city a was 3â° c, and city b was â’1â° c. city a was 8â° c, and city b was â’3â° c. city a was 5â° c, and city b was â’5â° c.

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.

If you add 5.00 ml of 0.100 m sodium hydroxide to 50.0 ml of acetate buffer that is 0.100 m in both acetic acid and sodium acetate, what is the ph of the resulting solution? acetic acid: ka = 1.8. x 10-5