The boiling point of a substance is affected by a.
the mass of the substance.
b.
the substance’s volume.
c.
the pressure of the air above the substance.
d.
the weight of the substance.

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.

All forces cause motion? true or false