How do you find the charge of a cell given a diagram of its bonding with other elements?

Acrystal that absorvd water from air is (blank)a. aqueousb. homogenousc. hygroscopicd. efflorescent

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?

What is the morality of 2.50 l of solution that contains 1.85 mol of anhydrous sodium tetraborate?