What is the correct way to represent 5600 l using scientific notation

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o

Equal numbers of moles of he(g), ar(g), and ne(g) are placed in a glass vessel at room temperature. if the vessel has a pinhole-sized leak, which of the following will be true regarding the relative values of the partial pressures of the gases remaining in the vessel after some of the gas mixture has effused?