Which is evidence that supports the dynamo theory?

A. Silicon is a conductive material.

B. Convection occurs in the mantle very slowly.

C. Iron does not conduct electricity.

D. Earth's core contains mostly iron and nickel.

Benefits of using n2o as a refrigerant.

Which one of the following is not true concerning Diels-Alder reactions? a. The reaction is stereospecific. b. The reaction mechanism has only one step. c. The reaction mechanism involves a resonance stabilized carbocation. d.

The amount of stored chemical energy is what determines the temperature of a substance True False

What substance can act as catalysts in the body?

Smog is the term used to describe the combination of fog and smoke

A) If you weigh a hydrated compound before and after heating it. Do you expect the mass to be more or less than before heating? Explain why. b) How about if you weigh a bag of popcorn before and after heating it.

Define the term relative molecular mass

It took many of the metals several minutes to begin to react. Once the reaction was initiated, several of these metals continued to react quite vigorously.

What dose the smooth ER do

How many valence electrons are in each atom?