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 is the relationship between mass, volume, and density? When you change one of those values, why do the others change, too?

Conversion factor 2.23 seconds to kilograms

You take a balloon and stick it in a refrigerator. The temperature inside the refrigerator is 4.0 °C and the temperature in your house is 22 °C. The balloon had an original volume of 0.50 L.

Which excerpt from amy tan's "fish cheeks" is most clearly an example of conflict? a. robert and his family waited patiently for platters to be passed to them. my relatives murmured with pleasure when my mother brought out the whole steamed fish. b.

Through which of the following media can sound waves travel? A. water and solids only B. air and solids only C. air and water only D. air, water, and solids

What compares a law and a theory?

Explain what domain would best be represented by the "?" in the diagram. A) Eukarya because the organisms are all eukaryotic. B) Eukarya because the organisms are all prokaryotic. C) Bacteria because some of the organisms are autotrophs.

If you are eating a hamburger, it is an example of a consumer eating another consumer. a) true b) false

What mass of NaNO3 is needed to make 3.5 L of 2.2 M solution? (Na = 23.0g, N=14.0g, O=16.0g) Explain in steps

In which group do all atoms have seven valence electrons in the ground state?