How many moles of hydrogen are produced from 57.5 grams of lithium?

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?

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What do many bases have in common? apex chemistry sem 2