How many milliliters of calcium with a density of 1.55 g/mL are needed to produce 12.4 g of hydrogen gas in the single replacement reaction below be sure to show the work that you did to solve the problem and balanced equation Ca + HF -> CaF2 + H2

Why do sodium and neon have vastly different chemical and physical properties despite having similar atomic masses?

For the reaction c6h14(g) & longrightarrow; c6h6(g) + 4h2(g), δp(h2)/δt was found to be 2.5 x 10-2 atm/s, where δp(h2) is the change in pressure of hydrogen. determine δp(c6h14)/δt for this reaction at the same time.

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?