How many photons are produced in a laser pulse of 0.682 J at 649 nm?

Compute the ionization energy for a single atom of hydrogen

The calculated yield for iron sulfide was 16.8 grams but the measured yield was 11.6 g what is the percent yield? 2FeBr3+3Na2S=Fe2S3 + 6NaBr

What quantum numbers specify a 5p orbital?

A geneticist has discovered a new compound that is made up of a small number of identical subunits. The subunits are joined end to end in long chains. Based on this information, what best can be concluded about these subunits? A. They are ketones. B.

An atom has 25 protons, 20 neutrons, and 19 electrons. Which atom is this, What is the atom's mass number?

To what chemical reaction class does this reaction belong? 2 mg (s) + o2 (g) 2 mgo (s)

Which best illustrates how particle arrangement changes when solids change into liquids

Express in scientific notation (6.0x10^4) (3.1x10^-1)

How do you measure the mass of a liquid?

Given the following information, calculate the mass for B-11. B-10 has a natural abundance of 19.9 percent, while B-11 has a natural abundance of 80.1 percent. The mass of B-10 is 10.013 amu.