Balancing Equations, Mole Ratio, Changes in Matter Quiz

__________ is a change in matter wherein the substances remain the same.

In a chemical change, differences in ______________ are present in transformed substances.

This is a way to represent a chemical reaction.

• Chemical reactions

• Chemical equations

• Reactants

• Products

the nomenclature of Iron sulphide is?

The following explains the Collision theory EXCEPT TWO:

• Particles that are to react must get closer and closer until they produce effective collisions

• It is not a primary requirement for reactant particles to have enough energy

• Proper orientation is a prerequisite for substances to react

• An effective collision would not redistribute the reactant atoms

TRUE OR FALSE:

If the particles of the reactants collide effectively, chemical bonds between atoms are broken.

TRUE OR FALSE:

A chemical reaction always takes place at the same rate.

TRUE OR FALSE:

The reaction rate depends on the efficiency of the collisions.

I. There is a inverse proportion between the reaction rate and the contact surface between the reactants.

II. By dividing the reactants, there is a larger contact surface between their particles, which is why there are more effective collisions between them.

• All statements are correct.

• All statements are incorrect.

• First statement is incorrect, the second is correct.

• First statement, is correct, the second is incorrect.

TRUE OR FALSE:

Reaction rate increases at lower temperatures.