The combining of hydrogen and oxygen gas into liquid water is an example of what kind of change?
a. phase
b. chemical
c. physical

How have the greenhouse gasses increased from the year 2000 to 2018

Using the first volume and temperature reading on the table as v1 and t1, solve for the unknown values in the table below. remember to use the rules of significant figures when entering your numeric response.

Covalent compounds: mastery test select the correct answer what is formed when atoms join together with a covalent bond? a. an ion b. a molecule c. a neutral atom d. a noble gas