Of the 20 amino acids, how many amino acids are considered essential? why are they called essential?

The name for the compound Cu3 (PO4) 2 (s) is Select one: a. tricopper diphosphate b. copper phosphide c. copper phosphate d. copper (II) phosphide

Which of the following is true for all chemical reactions?. a) the total mass of the reactants increase. b) the total mass of the products is greater than the total mass of the reactants.

The experiment where the factors being tested are not applied. It allows scientists to set a baseline to compare the experimental groups that do have factors applied to them.

Which sentence correctly describes the position of electrons within an atom? A. Electrons exist outside the nucleus in indistinct electron clouds B. electrons orbit the nucleus in distinct circular paths c.

Why is PCl3 called phosphorus trichloride

When the nonelectrolyte glucose is dissolved in water, the solution contains___.

Pure substance definition is?

What is the net ionic equation for the reaction ofFeCl3 and KOH in water?

How many total orbitals are within the 3s, 3p, and energy level?

When are tides highest? a. during the moon's first quarter phase b. when the sun, Earth, and the moon are nearly in a line c. during the moon's third quarter phase d. when the moon is at a right angle to the sun