When the electron in a hydrogen atom moves from n = 6 to n = 1, light with a wavelength of ________ nm is emitted.

How many unpaired electrons are present in the ground state Sn atom?

The element that corresponds to the electron configuration 1s22s22p63s23p64s23d1 is

For a process at constant pressure, 5250 joules are released. This quantity is equivalent to 1 cal = 4.184 J

Which of the following (with specific heat capacity provided) would show the smallest temperature change upon gaining 200.0 J of heat?

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

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.

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.