Directions: Read and analyze the following questions and compute for what is unknown in the given problem. Show complete solution by stating the given and unknown, and show the process from writing the formula to unit conversion (if applicable). 1. Suppose you added 4.0 moles of sugar to 10.0 L of solution. Calculate the molar concentration of the solution. 2. A sample of water taken from a nearby lake is found to have 0.0035 mol of salt in a 100mL solution. Determine the molar concentration of the solution in the lake. 3. You dissolve 30.0g of sodium sulfate (Na2SO4(s) into 300mL of water. Calculate the molar concentration of the solution. 4. What is the Molality of a solution containing 7.78g of Urea [(NH2)2CO2] in 203g of water? 5. Lead is a poisonous metal that especially affects children because they retain a larger fraction of lead than adults do. Lead levels of 0.250ppm in a child cause delayed cognitive development. How many moles of lead present in 1.00g of child's blood would 0.250ppm represent. 6. Acetone, C3H6, is the main ingredient of nail polish remover. A solution is made up by adding 35.0mL of acetone (d-0.790g/mL) to 50.0mL of ethyl alcohol, C2H6O (d%3D0.789g/mL). Assuming volumes are additive, calculate (a) the mass percent of acetone in the solution. (b) the volume percent of ethyl alcohol in the solution. (c) the mole fraction of acetone in the solution.