Please help!! 1. Find the number of moles in 90 liters of fluorine (F2) gas at STP?

2. A gas containing carbon and hydrogen has a density of 1.34 g/L at STP. What is the molar mass of the substance?

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

In the particles are arranged in a regular, repeating pattern. a)a crystalline liquid b)a crystalline solid c)all gases d)all solids

For each of the following compounds, decide whether the compound's solubility in aqueous solution changes with ph. if the solubility does change, pick the ph at which you'd expect the highest solubility. you'll find ksp data in the aleks data tab. compounds does solubility change with ph