Which statement is best described as a atom

How many moles of PH3 are in 250.0 grams of PH3

There are seven types of crystals. Which of these is not one of the seven? a. triclinic b. tetraclinic c. tetragonal d. orthorhombic

Which two bases pair with each other?

Cassandra looked out the window. She saw a boy moving down through the air. The boy moved all the way down to the ground. He pushed off the ground with his legs. Then he moved up into the air. Cassandra moved to the side to see more.

When potential energy changes to kenetic this is called?

How many dozens of particles of dust are in 2.45 grams if each dust particle has a mass of 2.51 x 10-4 grams?

What is the number of mole equivalents of H2 produced by the reaction of 1 mole equivalent of Mg (m) with H2SO4 (aq) ?

For two variables in a direct proportion, what is the result of doubling one variable? the other variable is doubled the other variable is halved the other variable stays constant

Electrons located in the outermost shell of an atom are called

Sentence for death rate