What does the coefficient 2 indicate in the compound 2so4? a. the number of oxygen atoms b. the number of sulfur atoms c. the number of so4 molecules

Adrop of acetone (nail polish remover) has a mass of 35 mg and a density of 0.788 g/cm3. what is its volume in cubic centimeters?

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

What material does not melt at any temperature