We know now that fire and air are not elements because
a) Air cannot be seen
b) Air could put out a fire
c) Fire is not only hot but dry too
d) Fire requires oxygen and air has oxygen in it

The concept of empiricism states that all rationally accepted knowledge is determined from experience. francis bacon was one of the first scientists to promote this theory. what was it’s impact on society?

Place the elements below in order of decreasing ionization energy. aluminum(al) chlorine(cl) magnesium (mg) sulfur(s)

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?