In a 100 mL beaker, add 0.5 g of finely powdered hydrated copper(II) sulfate, 2.5 g of triphenylphosphine, and 40 mL ethanol. Heat and stir until all of the triphenylphoshine and most of the CuSO4is dissolved. Remove the solution from heat and then carefully and slowly add 0.5 g of sodium borohydride (caution: the reaction with effervesce and you should allow the bubbling after each addition to subside before adding more borohydride). Filter the solution under suction to isolate the crude product. Dissolve this crude product in 15 mL of methylene chloride and then gravity filter the solution into a 50 mL beaker. Rinse the residue with a minimal amount of methylene chloride. Heat the methylene chloride solution in a boiling hot water bath. While the methylene chloride is evaporating, slowly add 25 mL of ethanol. When the total volume has reduced to ~30 mL, remove the solution from the hot water bath and allow the solution to cool to ambient temperature. Filter the resulting mixture and wash the crystalline residue (your product) with ethanol. Dry the product under vacuum. Obtain an IR spectrum of your product. Also, obtain an IR spectrum of triphenylphosphine as a reference.

Noble gases are the most reactive elements on the periodic table. a. true b. false

Define dew point. i am writing this part to be able to ask the question

1. an experiment in your science class lists the materials needed for the lab. it is your job, as a lab partner, to measure out 25 ml of distilled water and 2.5 grams of magnesium. what lab measuring tools would you choose to measure each substance and how would you use each tool to get the correct amounts? be sure to describe the process you would follow step-by-step. (5 points) 2.which of the following is an si base unit for measuring mass? (2 points) ampere gram meter pound 3.which of the following is an si base unit for time? (2 points) decades hours minutes seconds 4.which of the following tools should a scientist use to measure an object in milligrams? (2 points) graduated cylinder pan balance tape measure thermometer 4.which of the following tools should a scientist use to measure an object in milligrams? (2 points) graduated cylinder pan balance tape measure thermometer. 5.a pencil beside a metric ruler. the ruler is scaled from 1 centimeter to 10 centimeters, with markings for millimeters between each number. one end of the pencil is beside the 0 on the ruler, and the pencil point is beside the 5. which of the following measurements is accurate but not precise? (2 points) 5 mm 5 cm 50 mm 50 cm 6. which of the following prefixes represents the largest value? (2 points) giga hector kilo milli 7. which of the following types of graphs is best for plotting the percentages of a whole value in a data set? (2 points) bar graph circle graph histogram line graph