What are the 7 clues that a chemical change has occurred

A pair of oppositely charged parallel plates is separated by 5.38 mm. A potential difference of 623 V exists between the plates. What is the strength of the electric field between the plates? The fundamental charge is 1.602 * 10-19.

The reaction between nitrogen and hydrogen to produce ammonia is described as an equilibrium reaction. what substances are present in the reaction mixture when equilibrium has been obtained?

A sample of an unknown gas (gas A) has a volume of 3.2 m3 at a temperature of 10 degrees C. Another sample of an unknown gas (gas B) has a volume of 4.5 m3 at a temperature of 250 degrees C.

One of the goals of psychology is to predict future behavior or mental processes. Which of the following scenarios best illustrates this goal?

As a roller coaster car starts down a slope, it's velocity is 4m/s. But 3 seconds later it's velocity is 22m/s in the same direction. What is its acceleration

What is the one thing you can do to control the momentum your car carries in a potential crash?

Two charges q1 and q2, that are distance d apart, repel each other with a force of 6.40 N. what would be the force between two charges q1 and = 2q and q2=3q, that are distance d apart?

How fast would a particle be traveling relative to an experimenter in order to have a measured mass that is 20 times its rest mass?

A 4148-kg truck traveling with a velocity of 12 m/s due east collides head-on with a 898-kg car traveling with a velocity of 40 m/s due west. The two vehicles stick together after the collision.

The Coriolis effect