Calculate the longest and shortest wavelengths of light emitted by electrons in the hydrogen atom that begin in the n=6 state and then fall to states with smaller values of n.

Calculate the longest and shortest wavelengths of light emitted by electrons in the hydrogen atom that begin in the n=6 state and then fall to states with smaller values of n.

I have three questions from chemistry that I don't understand please help and can I get step-by-step work so I can understand how to do this for myself. 1. Convert 52.7 pints to cm3. 2. Convert...

20. Calculate ∆H for the reaction of sulfur dioxide with oxygen. 2SO2 (g) + O2 (g) → 2SO3 (g) (∆Hf 0 SO2 (g) = –296.8 kJ/mol; ∆Hf 0 SO3 (g) = –395.7 kJ/mol) a. –98.9 kJ c. 197.8 kJ b...

∆Hf 0 for the formation of rust (Fe2O3 ) is –826 kJ/mol. How much energy is involved in the formation of 5 grams of rust? a. 25.9 kJ c. 66 kJ b. 25.9 J d. 66 J

18. For which one of the following reactions is the heat of the reaction also a heat of formation of the product? a) N2(g) + 3H2(g) ----> 2NH3(g) b) (1/2)N2(g) + O2(g) ---->...

17. Given the following heats of formation: SO2(g) = -297 kJ/mole, SO3(g) = -396 kJ/mole determine the heat of reaction (in kJ) for 2SO2(g) + O2(g) ----> 2SO3(g) a) -99 c) 99 b)...

11. 3N2O(g) + 2NH3(g) -----> 4N2(g) + 3H2O(g) Enthalpy change = -879.6 kJ What is the heat of formation for N2O in kJ/mole (heats of formation: NH3 = -45.9 kJ/mole and H2O =...

11. 3N2O(g) + 2NH3(g) -----> 4N2(g) + 3H2O(g) Enthalpy change = -879.6 kJ What is the heat of formation for N2O in kJ/mole (heats of formation: NH3 = -45.9 kJ/mole and H2O =...

3. 2Al(s) + 3O2(g) -----> 2Al2O3(s) enthalpy change is -3351 kJ What would be the enthalpy change (in kJ) for the formation of 65.0 g of Al2O3(s)? a) -251000 b) -126000 c) -2464 d)...

A little help please?

30 mL of 0.10M Ba (OH)2 (aq) is added to 30 mL of 0.10 M H2SO4 and the solution is stirred quickly. The rise is temperate T 1 is measured. The experiment is repeated using 90 mL of each solution and...

When 0.157 lol NH3 is reacted with excess HCl, 6.91 kJ of energy is released as heat. How do I calculate the energy change per mole of NH3?

1/2O2 (g)+ Hg (l)====> HgO (s) ΔH= -90.8 kJ. How do I calculate how much heat is released when 42.5g of By is reacted with oxygen

3Al (s)+3O2 (g)===> 2AlO3 (s) ΔH= -3351kJ How do I calculate the change in enthalpy in kJ for the formation of 65.0 g of Al2O3?

The heats of combustion of C, H2, and CH4 at 298K and 1 atm are respectively -393 kJ/mol, -286 kJ/mol, and -892 kJ/lol. How do I calculate the enthalpy of formation for CH4 using the given information...

How do I calculate how much heat energy is required to hear a 150g sample of ice initially At -14°C to 30°C?. I know that I am supposed to use the equation q=mcΔT at some point, but...

A student attempts to separate a sample of cyclohexane and ethylbenzene by distillation. After the distillation the student obtains an n 20D of 1.4355 for what should be pure cyclohexane with...

Calculate the mass of one mole of water. Given that the density of water is 1 g/mL, how many mL is that. I need help. I don't understand.

So what is the expected amount of caffeine? Is it 0.0675g or is it 0.135g? In lab, I recovered 0.018g of caffeine

I have a proportion that for every 1 mol of Aluminum, I get 1.5 mol Copper. How much aluminum will I need if I have 127,226,463.1 grams of copper?