A piece of pure silver foil is cut to dimensions of 3.00 cm x 5.00 cm. Its mass is measured as 0.483 g.  Given the density of Ag is 10.5 g /cm3, and the diameter of a single Ag atom is 288 pm, how many Ag atoms span the thickness of the foil?

Which of the following is an intensive (bulk) property of matter?

The empirical formula of a compound is C7H5O2. If the molecular mass of this compound is242 amu, what is its molecular formula?

How many oxygen atoms are there in 2.74 g of Al2(SO4)3?

Which compound below has an empirical formula of C2H3 ?

3,4-Methylenedioxymethamphetamine, commonly known as Ecstasy, is a psychoactive drug with the molecular formula, C11H15NO2. Which compound below has the same empirical formula as this substance?

Which substance below contains the largest number of atoms?

How many protons, neutrons, and electrons are there in one ion of  205Pb 2+ ?

Which of these distances is the longest?

How many kilometers (km) are there in 37 picometers (pm)?