A runner wants to run 10.1 km. Her running pace is 8.3 mi/hr. How many minutes must she run?

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas