Concept explainers
Practice ProblemATTEMPT
Determine the number of significant figures in the following measurements:
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Chemistry
- Practice excercise 1arrow_forward(6) A group of students collected 125 empty aluminum cans to take to therecycling center. If 21 cans make 1.0 lb aluminum, how many liters ofaluminum (D=2.70 g/cm3) are obtained from the cans? (Example worked inclass)arrow_forwardPractice Exercise 1Platinum, Pt, is one of the rarest of the metals. Worldwideannual production is only about 130 tons. Platinum has a densityof 21.4 g>cm3. If thieves were to steal platinum from a bank usinga small truck with a maximum payload capacity of 900 lb, howmany 1 L bars of the metal could they take?(a) 19 bars (b) 2 bars (c) 42 bars (d) 1 bar (e) 47 barsarrow_forward
- NO NEED TO SHOW ANY WORK JUST FINAL ANSWER AS QUICKLY AS POSSIBLE! Incredibly, the ozone layer in the upper atmosphere that protects us from the ultraviolet rays of the Sun varies somewhat but, on the average, would be less than one centimeter thick if it were brought down to sea level. Given that the density of ozone at sea level would be about 2.0 grams per litre, what is the total amount of ozone (in Tonnes) in the upper atmosphere when its sea-level thickness is 0.22cm? Take the radius of the Earth to be 6400 km. (The volume of a thin skin around an object is the surface area of the object times the skin thickness.) Give your answer in gigatonnes, and do not specify units in the answer box.arrow_forwardPractice Exercise 1Which of the following weights would you expect to besuitable for weighing on an ordinary bathroom scale? 2.0 * 107 mgarrow_forwardSuppose that instead of using the cylindrical rod of Example 1-2 to prepare a 1.000 kgmass we were to use a solid spherical ball of copper What must be the radius of this ball?arrow_forward
- Give the following equation solve for M. Answer In scientific notation & 2 sig figs. 0.47 absorbance divided by 4713.6 mol/L = M?arrow_forwardIf the average mass of a tablet is 0.5 g, how much tablet powder will contain 0.45 g of ibuprofen when the stated content is 400 mg? answer to 4 decimalsarrow_forward▶ Practice Exercise 1You are asked to determine the mass of a piece of copper using itsreported density, 8.96 g/mL, and a 150-mL graduated cylinder.First, you add 105 mL of water to the graduated cylinder; thenyou place the piece of copper in the cylinder and record a volumeof 137 mL. What is the mass of the copper reported with the correctnumber of significant figures? (a) 287 g (b) 3.5 * 10-3 g/mL(c) 286.72 g/mL (d) 3.48 * 10-3 g/mLarrow_forward
- I think its either 1 or 2 but im not sure, its difientely not 4 though. I asked this question on bartleby multiple times and both times I got differnt answers please choose the correct answerarrow_forwardWhat is the mass of a magnesium block that measures 5.00 cm × 2.00 cm × 2.00 cm? The density of magnesium is 1.738 g/cm3. Please type answer note write by hend.arrow_forwardA cylindrical bar was found at the bottom of a storage tank of unknown composition. The material had a diameter of 8 mm, a length of 62 cm and a mass of 0.018 kg. What is the density of this material in g/mL? The volume of a cylinder is given by V = πr^2h.arrow_forward
- General Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage LearningIntroductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage Learning