T Why don't the present shapes of the continents fit perfectly into a supercontinent

How do chemists express the rates of chemical reactions

A body, upon heating, becomes red first, then yellow, and then other colors. Why? A - Red light has the lowest frequency B - Yellow light has the lowest frequency C - Red light has the highest frequency D - None of the above

A sample of an unknown metal (density = 4.920 g/mL) weighs 550.0 g. What is the volume of this piece of metal? a. 111.8 mL b. none of these c. 2.706 * 10^3 mL d. 1.118 * 10^5 mL e. 8.945 * 10^-3 mL

How could you calculate the number of grams of O2 needed to completely react with a certain amount of ethane?

If you add heat to a solid, the particles will ... (choose all that apply) * Shrink Move further away from each other (expand) Explode Begin moving faster (speed up) Begin moving slower (freeze) Move closer together Split

Bismuth-211 decays by emitting an alpha particle.

What is a successful outcome for using a scientific method? develop a theory develop a hypothesis support a hypothesis analyze data

A ping pong ball with a mass of 2.20 grams rolls along a frictionless table with a velocity of 0.850 m/s. what is the momentum of the ping pong ball?1.87 g m/s2.59 g m/s1.59 g m/s3.04 g m/s

Elements have been discovered with up to how many energy levels

How many minutes are in 33.6 days