Calculate the mass percentage of benzene and carbon tetrachloride

solution; Molarity (M) is defined as number of moles of solutedissolved in one litre (or one cubic decimetre) of solution. (a) Mol. mass of Co ( NO 3 ) . 6 H 2 O = 58 . 9 + ( 14 + 3 × 16 ) 2 + 6 ( 18 ) = 58 . 9 + ( 14 + 48 ) × 2 + 108 = 58 . 9 + 124 + 108 = 290 . 9 Moles of Co ( NO ) 3 . 6 H 2 O = 30 290 . 9 = 0 . 103 mol . Volume of solution = 4.3 L Molarity, M = Moles of solute Volume of solution in litre = 103 4 . 3 = 0 . 024 M (b) Number of moles present in 1000 ml of 0.5M H 2SO 4= 0.5 mol therefore number of moles present in 30ml of 0.5MH 2SO 4= 0 . 5 × 30 1000mol =0.015mol therefore molarity =0.015/0.5L thus molarity is 0.03M

Calculation of Mass Percentage of Benzene and Carbon Tetrachloride To calculate the mass percentage of benzene and carbon tetrachloride in the given solution, we need to follow the steps given below: Step 1: Calculate the total mass of the solution. Total mass of the solution = mass of benzene + mass of carbon tetrachloride = 22g + 122g = 144g Step 2: Calculate the mass of each component in the solution. Mass of benzene in the solution = 22g Mass of carbon tetrachloride in the solution = 122g Step 3: Calculate the mass percentage of each component. Mass percentage of benzene = (mass of benzene in the solution/total mass of the solution) x 100% = (22g/144g) x 100% = 15.28% Mass percentage of carbon tetrachloride = (mass of carbon tetrachloride in the solution/total mass of the solution) x 100% = (122g/144g) x 100% = 84.72% Explanation: The given solution contains 22g of benzene and 122g of carbon tetrachloride. To find the mass percentage of each component, we need to calculate the total mass of the solution and the mass of each component in the solution. Then, we can use the formula of mass percentage to calculate the mass percentage of each component. The mass percentage of benzene in the solution is 15.28%, which means that 15.28% of the total mass of the solution is attributed to benzene. Similarly, the mass percentage of carbon tetrachloride in the solution is 84.72%, which means that 84.72% of the total mass of the solution is attributed to carbon tetrachloride. This ...

learning objectives • Calculate the mass percent composition of individual atoms in a compound • Use the mass percent composition as a conversion factor to determine the mass of a component in a mixture and vice versa • Use the mass percent composition as a conversion factor to determine the mass of a pure element in a compound and vice versa Mass Percent Composition Percent composition is very simple. Percent composition tells you by mass what percent of each element is present in a compound. A chemical compound is the combination of two or more elements. If you are studying a chemical compound, you may want to find the percent composition of a certain element within that chemical compound. The equation for percent composition is (mass of element/molecular mass) x 100. If you want to know the percent composition of the elements in an compound, follow these steps: Steps to Solve: • Find the molar mass of all the elements in the compound in grams per mole. • Find the molecular mass of the entire compound. • Divide the component's molar mass by the entire molecular mass. • You will now have a number between 0 and 1. Multiply it by 100 to get percent composition! Tips for solving: • The compounds will always add up to 100%, so in a binary compound, you can find the % of the first element, then do 100%-(% first element) to get (% second element) • If using a calculator, you can store the overall molar mass to a variable such as "A". This will speed up calculations, and reduce ...