chpt 6

_____ is an example of a compound molecule

• Ice melting to become water

• Liquid nail polish hardening

• Exposed metal rusting

• Water evaporating into the air

Which of the following should you be sure to do when mixing chemicals

• Avoid rooms or areas that are well ventilated

• Use a measuring device,such as measuring cup or spoon

• Never use secondary containers,such as spray bottles

• Add the water to the chemical,not the other way around

Which of the following is TRUE of products that are incompatible

• No two should be stored next to each other

• They can be safely mixed with proper precautions

• They are always considered dangerous

• They should never be used on clients

Of all the elements known to science today, ______ occur naturally on Earth

• 19

• 89

• 98

• 18

During combustion of a substance ,_______ accompanies the rapid oxidation

• Neutralization

• A ionization of the substance

• The production of heat and light

• An endothermic reaction

______ is an example of chemical property or change

• Burning wood

• Boiling point

• Hair lightening

• Ice melting

• Odor

_____is an example of physical property or change

• Ice melting

• Boiling point

• Solubility

• Hardness

• Weight

When it comes to pure substance,______

• They can be mixed in any proportion

• Examples include air,salt water, and hydrogen peroxide

• Examples includes oxygen,aluminum and gold

• Examples includes most beauty products

• Composition does not very

_____are properties of chemical compounds

• Examples includes oxygen,aluminum,and gold

• Examples includes salt water,pure air,concrete and powders

• Examples includes salt,water and ammonia

• Composition does not vary

• Mixed in any proportion

____are properties of a physical mixture

• Composition does not vary

• Examples includes water,salt,and ammonia

• Mixed in any proportion

• Examples include oxygen ,aluminum,and gold

• Examples includes salt water,pure air ,concrete and powders