Calculation involve wavelength

A red blood cell contains 4.0 107 free electrons. what is the total charge of these electrons in the red blood cell?

A compound has been shown to contain 14.5 percent hydrogen and 85.5 percent carbon by mass. Choose the most informative and correct statement that can be made about the compound on the basis of the data given. Select one: a.

Where are the protons, neutrons, and electrons located in the atom? What charge do the protons, neutrons, and electrons have?

According to the periodic table which element most readily accepts electrons?

A fog forms over a lake. What two changes of state must occur to produce the fog?

How many electrons in an atom could have these sets of quantum numbers n=7 l=3 ml=-1?

The reaction A+B-> C+D rate=k[A][B]^2 has an initial rate of 0.0810 M/s. What will the initial rate be if [A] is halved and [B] is tripled? What will the initial rate be if [A] is tripled and [B] is halved?

What is the chemical formula for coper (ll) hydroxide?

A 1.50-g sample of hydrated copper (II) sulfate was heated carefully until it had changed completely to anhydrous copper (II) sulfate () with a mass of 0.957 g. Determine the value of x.

The reaction rate between reactants Z and Y is proportional to the cube of [Z]. What is the rate law for this reaction?