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

One mole of zinc has a mass of 65.4 grams. approximately how many atoms of zinc are present in one mole of zinc? 32 × 1023 atoms 6 × 1023 atoms 66 atoms 65 atoms

After watching the video "zinc strip in copper nitrate solution", and reading the instructions, click on the link labeled "start" just below the drawing of the pencil tip. follow the direction to complete the 3x3 grid. answer the below questions for the portion of the activity in which sn(s) is placed in agno3(aq)

Light waves travel than sound waves.