CHM 151

Energy

100

What formula can be used to calculate energy from frequency?

E=hv

h= planck's constant

200

What is the wavelength if the frequency is 60,000hz?

5000m

300

Calculate the wavelength of light that must be absorbed by a hydrogen atom to promote an electron from the n = 3 to the n = 5 energy level.   

RH= 2.179x10-18

1.29 x 10^-6 m 

Heat

100

Type of reaction where energy is released

Exothermic reaction

200

If the heat change of a reaction is 234 J is it endothermic or exothermic

Endothermic

300

Find ΔH

2 H₂S (g) + 3 O₂ (g) → 2 H₂O (g) + 2 SO₂ (g)

ΔHf°[SO2(g)] = -292.1 kJ/mol, 

ΔHf°[H2S(g)] = -26.15 kJ/mol, 

ΔHf°[H2O(l)] = -275.8 kJ/mol, 

ΔHf°[H2O(g)] = -221.8 kJ/mol, 

ΔHf°[O3(aq)] = -32.09 kJ/mol.

-974.5 kJ

Solubility

100

Soluble or insoluble 

PbCl₂

Insoluble

200

Determine the products, which is solid?

Na₂SO₄ (aq) + CaI₂ (aq) →

CaSO₄ (s) + 2 NaI (aq)

300

Finish the reaction and find the net ionic equation

AgNO₃ (aq) + K₂S (aq) --> 

2 Ag⁺ (aq) + S^-2 (aq) --> Ag₂S (s)

Electron Configuration

100

Noble gas configuration for Mg

[Ne] 3s²

200

Noble gas configuration for Cr^-2

[Ar] 4s² 3d⁶

300

Noble gas configuration for Pt⁺²

[Xe] 6s² 4f¹⁴ 5d⁶

Miscellaneous

100

Identify the answer using the correct number of sig figs in 

(.792 x 1.459) + (8.3/2.14)

5.0

200

Which of the following is an acid?

a. NaCl     

b. Ni(OH)₂    

c. CaSO₄     

d. HNO₃

d. HNO₃

300

How many mL would be needed to make a 1.4M solution out of 3.0L of a .350M soultion?

750 mL