Metallic mercury is obtained by heating the mineral cinnabar (HgS)(HgS) in air: HgS(s)+O2(g)→Hg(l)+SO2(g)HgS(s)+O2( g)→Hg(l)+SO2(g) Part A Use the data in Appendix B in the textbook to calculate ΔH∘ΔH∘ (in kilojoules) for the reaction. Express your answer using four significant figures.

What is the standard unit of measure for acceleration?

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?

Which statement are accurate about snow flakes