Chemistry for Today
8th Edition
ISBN: 9781133606994
Author: Seager, Spencer L./
Publisher: Cengage Learning
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A medium-sized carrot weighs 61 g and contains 6.0 g of carbohydrate.
Part A
What percent, by mass, of the carrot is a carbohydrate?
Express your answer using two significant figures.
PLEASE ANSWER THE SUB PARTS A,B, and C
QUESTION 12
For the questions that follow, you don't need to show your calculations. Just write your answers to each question below. Use appropriate sig figs
a. How many significant figures are in the measurement 6.02 x 1023 molecules of sugar?
b. Acetone is a solvent used in nail polish removers. It has a density of 0.791 g/mL. What is the volume in liters (L) of 20.0 grams of acetone? Careful with significant figures in your answer. (1 mL = 0.001 L)
c. A chemist synthesized 0.510 kg of aspirin in the laboratory. If the normal dose of aspirin is two (2) tablets of 325 mg each, how many doses of aspirin did the chemist prepare?
(1 g = 0.001 kg, 1 mg = 0.001 g)
A tablet of Benadryl (RR), an antihistamine, has a mass of 0.53 gg. It contains 25 mg of the active ingredient, diphenhydramine HCLHCL.
Part A
What percent of the tablet is an active ingredient?
Express your answer using two significant figures.
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- a. How many kilograms are in 1 teragram? b. How many nanometers are in 6.50 x 102 terameters? c. How many kilograms are in 25 femtograms? d. How many liters are in 8.0 cubic decimeters? e. How many microliters are in 1 milliliter? f. How many picograms are in 1 microgram?arrow_forwardWhen chlorine gas is bubbled into a solution of sodium bromide, the sodium bromide reacts to give bromine, a red-brown liquid, and sodium chloride (ordinary table salt). A solution was made by dissolving 20.6 g of sodium bromide in 100.0 g of water. After passing chlorine through the solution, investigators analyzed the mixture. It contained 16.0 g of bromine and 11.7 g of sodium chloride. How many grams of chlorine reacted?arrow_forward1.30 The largest computers now include disk storage space measured in petabytes. How many bytes are in a petabyte? (Recall that in computer terminology, the prefix is only “close” to the value it designates in the metric system.)arrow_forward
- 1.18 Two golfers are practicing shots around a putting green. Each golfer takes 20 shots. Golfer 1 has 7 shots within 1 meter of the hole, and the other 13 shots are scattered around the green. Golfer 2 has 17 shots that go into a small sand trap near the green and 3 just on the green near the trap. Which golfer is more precise? Which is more accurate?arrow_forwardConsider the results of the archery contest shown in this figure. Which archer is most precise Which archer is most accurate Who is both least precise and least accuratearrow_forwardVisit this PhET density simulation (http://openstaxcollege.org/l/16phetmasvolden) and select the Same Volume Blocks. What are the mass, volume, and density of the yellow block What are the mass, volume and density of the red block List the block colors in order from smallest to largest mass. List the block colors in order from lowest to highest density. How are mass and density related for blocks of the same volumearrow_forward
- Referring to Table 2.8, which substance listed is most dense? Which substance is least dense? For the two substances you have identified, for which one would a 1.00-g sample occupy the larger volume?arrow_forwardA thief plans to steal a bar of gold from a womans purse and replace it with a bag of sand. Assume that the volumes of the gold and the sand are 350 mL each and that the density of sand is 3.00g/cm3. a. Calculate the mass of each object. b. Would the woman notice a difference in the weight of her purse?arrow_forwardWrite conversion factors (as ratios) for the number of: yards in 1 meter liters in 1 liquid quart pounds in 1 kilogramarrow_forward
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