On July 4, 2020, America turned 7.69 x 10^9 seconds old. On that day, how old was America
in years? (Assume 365 days in a year)

How many moles are contained in 5.6 l of h2 at stp

Arrange the elements in order of increasing electronegativity. use the periodic table to you arrange the elements. p o k mg

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?