which one of the following contains the highest percentage composition by mass of nitrogen (n=14, o=16)

An boron isotope consist of 5 protons 5 electrons and 6 neutrons its mass number is?

Why is it possible to use physical properties to separate a mixture

The following substance would be classified as an omega-3 fatty acid.

If 4.35 grams of zinc metal react with 35.8 grams of silver nitrate, how many grams of silver metal can be formed and how many grams of the excess reactant will be left over when the reaction is complete? Show all of your work.

Which statement correctly describes a solution with a pH of 9? (1) It has a higher concentration of H3O + than OH - and causes litmus to turn blue. (2) It has a higher concentration of OH - than H3O + and causes litmus to turn blue.

After a particularly cold day outside you go home to make some tea. you heat the water in the mug so that botch are about 75 degrees celcious. the tea bag is only 30 degrees celcious and the room is around 26 degrees celcious.

For main-group elements using the older numbering system the group number on the periodic table corresponds to which characteristic of the elements of that group

In the vertical columns of the periodic table, as the atomic numbers increase: a. the number of electron shells increases. b. the ionization energies increase. c. the number of electrons in the valence shell increases. d.

Which of the following solutions contains the largest total concentration of ions, assuming complete dissociation .010 M aluminum chloride .010M sodium chloride .010M aluminum sulfate .010M calcium chloride

What is the relationship between chemical equilibrium and the rates of forward and reverse reaction? a. In equilibrium, the forward reaction rate must be greater than the reverse reaction rate. b.