How can a scientist make sure that the results of an experiment are not a mistake?

5 examples of each chemical properties, physical properties, chemical changes, and physical changes.

Is nitrogen gas a pure substance or a mixture

A protein is a polymer that is made of a. simple sugars. c. amino acids. b. nitrogen and carbon dioxide. d. DNA.

The element magnesium would most likely have which one of these properties

If a car produces 88 grams of co2 how many grams of o is used up in the reactionin c2h6o o2

If you change the state of something, say, liquid to solid, is it a physical or chemical change?

What type of calorimeter would be best to use if you wanted to measure the heat that is released when gasoline is burned?

Tina has a sample of gaseous water at a temperature of 400 C and a pressure of 4 atm. If Tina increases the pressure to 200 atm, will the gaseous water liquefy? Why or why not?

Label the molecular shape around each of the central atoms in the amino acid glycine. hint

Which has more atoms, 2moles of carbon or 2 moles of aluminum