For the decomposition of sodium bicarbonate (NaHCO3) into sodium carbonate (NaOH), and carbon dioxide (CO2) what is the overall enthalpy of the reaction (ΔHrxn)? Is it endothermic or exothermic?
ΔHf NaHCO3 = -950.8 kJ
ΔHf NaOH = -425.6 kJ
ΔHf CO2 = -393.5 kJ
ΔHf Na2CO3 = -1130.7 kJ
ΔHf H2O = -285.8 kJ

Each of the following reactions is allowed to come to equilibrium and then the volume is changed as indicated. predict the effect (shift right, shift left, or no effect) of the indicated volume change. drag the appropriate items to their respective bins.co(g) + h2o(g) < => co2(g) + h2(g) (volume is decreased) pcl3(g) + cl2(g) < => pcl5(g) (volume is increased) caco3(s)< => cao(s) + co2(g) (volume is increased)

At element makes up all organic compounds?

You have a sample of a metal, the sample is exactly 6.02 x 1023atom, if the sample has a mass 55.85 what metal is your sample made of?