CO+2 H2=CH3OH
2.85 mol Co x (2mol H2/1 mol Co)=5.70 mol just concert to grams
5.70 mol H2 x (2 g H2/1 mol H2) =11.40 grams of H2
First, you need to be given the gram formula mass of this molecular or related conditions that can calculate this. Then you need the empirical formula and calculate the gram formula mass of empirical formula. Then use them to get the ratio. Finally you can get the molecular formula.
The arrangement of element in the modern periodic table is based on metalic and non metallic element
The solubility product would be written as follows:
Ksp = [M][3X]^3
letting s as the molar solubility
Ksp = s(3s)^3
Ksp = s(27s^3)
Ksp = 27s^4
The solubility product is a mathematical product of the dissociated ion concentration in the solution and raised to the power of the stoichiometric coefficients. Hope this helps.