solve Q 8 (plz dont give link)

solve Q 8 (plz dont give link) Q.6 Q.8 Q.10 Q.ll Q.12 2.13 15 g of methyl alcohol is present in 100 mL of solution. If density of solution is 0.90 g mL-• Calculate the mass percentage of methyl alcohol in solution Units of parts per million (ppm) or per billion (ppb) are often used to describe the concentrations of solutes in very dilute solutions. The units are defined as the number of grams of solute per million or per billion grams of solvent. Bay of Bengal has 1.9 ppm of lithium ions. What is the molality ofLi+ in this water ? A 6.90 M solution of KOH in water contains 30% by mass of KOH. What is density ofsolution in gm/ml. The average concentration ofNa+ ion in human body is 3 to 4 gm per litre. The molarity of Naf ion is about. What is the concentration of chloride ion, in molarity, in a solution containing 10.56 gm BaC12.8H O per litre of solution ? (Ba = 137) The concentration ofa solution is 8% (w/w) and 10% (w/v). Calculate density (in gm/mC) ofsolution? The mole fraction of solute in aqueous urea solution is 0.2. Calculate the mass percent of solute ? The concentration of Ca(HC03)2 in a sample of hard water is 405 ppm. The density of water sample is 1.0 gm/ml. Calculate the molarity of solution ? 0.115 gm of sodium metal was dissolved in 500 ml of the solution in distilled water. Calculate the molarity of the solution? How much BaC12 (in gm) would be needed to make 250 ml of a solution having the same concentration of Cl- as one containing 1.825 gm HCI per 100 ml ? (Ba = 137) „f'.M NH.CI assuming 1000,'