Which of the following is a mixture?
water
sugar
salad
coffee
Three mixtures are listed below. Which one could not be separated by evaporation?
salt and water
sawdust and water
iron filings and water
sawdust and iron fillings
Which of the following would not always cause a chemical change?
baking
burning
wetting
frying
Identify the observation that shows a chemical property of a material.
The liquid boils at 102 ºC.
The whitish powder is extremely toxic.
This material seems to be magnetic.
As a solid, this material is an excellent insulator.
What happens when hydrogen and oxygen react with each other?
There is an explosion.
Ice is created.
The gases remain odorless and colorless.
They create liquid water.
