What creates the van allen belts

a. earths gravity

b. deflection of charged particles

c. aurora borealis

d. convection in the mantel?

How are two atom of the same element alike?

What are the characteristics of Archaebacteria? A. they are single cells that have a nucleus and tend to live in extreme conditions. B. they are single cells that lack a nucleus and tend to live in extreme conditions. C.

In this model of a molecule of ammonia, NH3, how many covalent bonds are represented?

7. Which of the following describes the arrangement of valence electrons in a bond between C and H The valence electrons are shared equally between C and H. The valence electrons spend more time around the atom of C.

Um átomo X possui 8 neutrons e seu número atômico e igual a 8. Sabendo que esse atomo é isótopos de Y, que possui número de massa 18, responda: Qual o numero de nêutrons do atomo Y?

A gas has a volume of 5.0 L at a pressure of 50 KPa. What happens to the volume when the pressure is increased to 125?

What is the molar mass of Fe2Br3? 1.35 x 10^2 g/mole 3.27 x 10^2 g/mole 3.51 x 10^2 g/mole 8.14 x 10^2 g/mole

A gas with a volume of 5.0 L at a pressure of 215 kPa is allowed to expand to a volume of 14.0 L. What is the pressure in the container if the temperature remains constant?

Sunita carries out an experiment to investigate diffusion. She uses water and a food dye to find out how the volume of water used affects the time the dye takes to spread evenly through the water.

How are coefficients used to balance chemical equations?