True because if an old theory finds new information that can be changed if it’s different then the original material
Molecular is every element present in the compound eg C2H6, empirical is the smallest whole number ratio of elements in a compound so that would be CH3 as you divide by the highest common factor. Some compounds only have 1 formula if they are simple or have no common factors. Eg methane, CH4 is its molecular and empirical because its the simplest whole number ratio and includes every element in the molecule
When HCl is added to metal ions, metal chlorides are produced. In this problem, it is asked whether the given ions precipitate or not when added to HCl. According to the rule, all chlorides except Ag+, Pb 2+, Hg2 2+ are soluble. Hence the ion that would precipitate is only lead (II) ion.
To convert 3 mol H2O to grams, just multiply by the molar mass of H2O.
<span>3 mol H2O * 18 g H2O / 1 mol H2O = 54 g H2O
Hope this helped.</span>
