Calculate the wavelength (in nm) of the blue light emitted by a mercury lamp with a frequency of 6.88 × 1014 Hz. The speed of light is 3.00 × 108 m/s.

An electron cannot have the quantum numbers n = ________, l = ________, ml = ________.

A 100.0 mL sample of 0.300 M NaOH is mixed with a 100.0 mL sample of 0.300 M HNO3 in a coffee cup calorimeter. If both solutions were initially at 35.00°C and the temperature of the resulting solution was recorded as 37.00°C, determine the ΔH°rxn (in units of kJ/mol NaOH) for the neutralization reaction between aqueous NaOH and HCl. Assume 1) that no heat is lost to the calorimeter or the surroundings, and 2) that the density (1.00 g/mL) and the heat capacity (4.18 J/g°C) of the resulting solution are the same as water.

It takes 11.2 kJ of energy to raise the temperature of 145 g of benzene from 23.0°C to 68.0°C. What is the specific heat of benzene?

The ΔE of a system that releases 12.4 J of heat and does 4.2 J of work on the surroundings is ________ J.

A washer has an inner radius of 0.27 in. and an outer radius of 0.84 in. Find the area of thewasher (the shaded area) rounded to the nearest thousandth.

Perform the indicated operation by hand.If a tank has 15.469L of fuel and 14.548L are removed, how much remains? (L denotes liters)

Find the product. a)    (-46)(-4)(0)(-17)(-3)   a)      (-4)(-4)(6)(-2)

Convert to the indicated form.a)     15.9% to decimal form b)    0.0078 to percentage form

Given the following reactions2S (s) + 3O2 (g) → 2SO3 (g) ΔH = -790 kJ S (s) + O2 (g) → SO2(g)ΔH = -297 kJ the enthalpy of the reaction in which sulfur dioxide is oxidized to sulfur trioxide 2SO2 (g) + O2 (g) → 2SO3 (g)is ________ kJ.