Which of these terms best describes the following statement?
"a solution of the unknown compound turned litmus paper blue"
a. hypothesis
b. model
c. quantitative observations
d. qualitative observation

Agas can holds 2.0 gal of gasoline. what is this quantity in cubic centimeters?

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules