Q Focus Concept Problems Chemistry and Measurements CHM 1032 Name____________________________ Period__________________ Date_______________ 1. Indicate the type of measurement and unit name with the following quantities: I. Length II. Mass III. Volume IV. Temperature V. Time a. 55 kg ____________________ b. 7.5 cm ______________ c. 815 K ____________________ d. 8.5 s ___________________ 2. Write the following measurements in scientific notation and indicated the correct number of significant figures: a. 240 000 cm _____________ b. 0.002 m _________________ c. 325 cm ___________________ 3. State in each of the following statements whether it is measured (M) or exact (E). a. There are 1000g in 1 kg ___________________ b. The snake is 1.2 km long __________________ 4. Solve each problem and give the correct number of significant figures: a. 8.00/ 4.00 = __________________ b. 0.082 X 25.4/ 0.116 X 3.4 = _________________ c. 4.2 + 8.16 = ______________________ d. 38.520 – 11.4 = ___________________ 5. Use the Guide for Problem Solving (GPS) to solve the following problems to receive credit (note: refer to the notes, instructional video, and e-text). (a) In a triple-bypass surgery, a patient requires 5.00 pints of blood. How many mL of blood were given if 1 quart = 2 pints? (b) A doctor orders 0.460 g of a sulfa drug. On hand are 150- mg/tablet. How many tablets are needed? 6. Calculate the density or use density as a conversion factor to solve the following: (a) What is the density (g/mL) of glycerol if a 400. mL sample has a mass of 252 g? (b) A sugar solution has a density of 5.20 g/mL. What is the mass in grams of 0.250 L of the solution?

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