Given the enthalpy changes: A +B –> C ΔH= -35 kj/mol A + D –> E + F ΔH= 20 kj/mol F –> C + E ΔH= 15 kj/mol

Given chemical equations for these reactions: S(s) + O2(g) –> SO2 (g) ΔH°=-296.8 kj/mol H2(g) + 1/2O2(g) –> H2O(l) ΔH°=-285.8 kj/mol H2(g) + S(s) –> H2S(g) ΔH°=-20.6 kj/mol What is the value for ΔH for the reaction below? 2H2S(g) + 3O2(g) –> 2H2O(l) + 2SO2(g)

When 30.0 ml of 0.10 M AgNO3 is added to 30.0 ml of 0.10 M NaCl, aqueous NaNO3 and solid AgCl are formed. How much solid AgCl is produced?

Vanillin, C8H8O3 (mm= 152 g/mol), is the molecule responsible for the vanilla flavor in food. How many oxygen atoms are present in 45.0 mg sample of vanillin?

Benzene, C6H6, reacts with oxygen, O2, to form CO2 and H2O. How much O2 is required for the complete combustion of 1.0 mol of C6H6?

Which element has chemical properties most similar to those of P?

100. ml of 0.220 M copper(II) chloride is mixed with 100. ml of 0.750 M sodium hydroxide.           CuCl2 + 2NaOH –> Cu(OH)2 (s) + 2NaCl What is the concentration of the negative spectator ion?  

Calculate the average density

What the correct process for graphing the following equation? I want you to explain where you would begin and where you would move from there.

Write an equation for this situation where “N” is used for miles from Josh’s home and “t” for the time in hours.