Compared to a 0.500 mole sample of Helium gas at 0.00°C and 760. mmHg, a 0.500 mole sample of
Hydrogen at 298 K and 101.3 kPa contains
A) molecules having higher average kinetic energy
B) fewer molecules
C) more molecules
D) molecules having lower average kinetic energy

How will the emission of an alpha particle affect the atomic number of an atom

Part b: study of equilibrium on solubility: mg(oh)2(s) ⇌ mg2+(aq) + 2 oh–(aq) cloudy clear (pink) 7. a. b. 8. a. b. 9. 10. 11. 12. when adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 7a. you should indicate which ion was added to or removed from the equilibrium mixture. when adding edta, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 8a. you should indicate which ion was added to or removed from the equilibrium mixture. upon heating in which direction is the equilibrium shifting? upon cooling in which direction is the equilibrium shifting? is the forward reaction a. endothermic explain your answers to questions 9, 10, and 11. (l) left (r) right (l) left (r) right b. exothermic

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.