Science

What type of property is color?

Color is a chemical property.

What is density? What is the formula for density?

Density is the mass per unit volume of a substance. The formula for density is D = m/v.

What is the law of conservation of mass? What evidence would you observe if the law of conservation of mass is obeyed when mixing two solutions?

The law of conservation of mass states that the total mass before a chemical reaction is the same as the total mass after the chemical reaction. I would observe that when I measure the reactants before mixing, the sum of the reactants should equal the mass of the product.

What is a chemical reaction in which more energy is absorbed than released? What is a chemical reaction in which more energy is released than absorbed?

A chemical reaction in which more energy is absorbed than released is endothermic. A chemical reaction in which more energy is released than absorbed is exothermic.

Does a substance's chemical or physical properties predict how it will react with other substances?

A substance's chemical properties predict how it will react with other substances.

What is an endothermic reaction? What is an exothermic reaction?

An endothermic reaction is a reaction which absorbs more energy than is released. An exothermic reaction is a reaction which releases more energy than is absorbed.

What type of property is mass?

Mass is a physical property.

What type of property is state of matter?

State of matter is an example of a physical property.

What is the difference between mass and weight?

The difference is that mass is the amount of matter in an object whereas weight is the amount of gravitational pull on an object.

What are three examples of a chemical change?

Three examples of a chemical change are lighting a match, iron rusting, and frying a hamburger.

What happens when a chemical bond is broken? What happens when a chemical bond is formed?

When a chemical bond is broken, energy is released. When a chemical bond is formed, energy is absorbed.

When a substance undergoes a chemical change, does it's identity change? When a substance undergoes a physical change, does it's identity change?

When a substance undergoes a chemical change, it's identity changes. When a substance undergoes a physical change, it's identity doesn't change.

Is energy needed to break bonds in chemical reactions?

Yes, energy is needed to break bonds in chemical reactions.

Can you classify matter based on chemical properties? Can you classify matter based on physical properties?

Yes, you can classify matter based on chemical properties. No, you cannot classify matter based on physical properties.

How can you cause a chemical change to a piece of paper?

You can burn it.