When sodium is excited in a flame, two ultraviolet spectral lines at lambda - 372.1 nm and lambda = 376.4 nm respectively are emitted. which wavelength represented photons?

a) higher energy?

b) longer wavelengths?

c) higher frequences?

What effect does the electromagnetic force have?

Which has more surface area, a rock the size of your hand or a handful of small rocks?

What is the molar mass of PCL3

If the mass of a material is 96 grams and the volume of the material is 25 cm3, what would the density of the material be?

How many oxygen atoms are present in a 14.0 g sample of Cu (NO3) 2

Car Q and z are put though an endurance test to see if they can travel at 120 km/h for 5.0 hours. Each car has a 45-L fuel tank. Car z must stop to refuel after traveling for 4.2 hours. Car Q, however, travels for 5.4 hours before running out of gas.

What happened to the atoms in the heated metal ball so that it didn't fit through the ring?

A 3.00 L flexible container holds a sample of hydrogen gas at 153 kPa. If the pressure increases to 203 kPa and the temperature remains constant, what will the volume be?

Measurement of the functions of a nephron reveals a glomerular capillary pressure of 69 mm Hg, and a pressure in the capsular space of 15 mm Hg.

Water is unique because the density of it's solid is less than the density of it's liquid. Describe how life would be different if this weren't true