Concept explainers
State the name of the unit and the type of measurement indicated for each of the following quantities:
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Basic Chemistry
- Which of these choices is the general electron configuration for the outermost electrons of elements in the alkaline earth group? Select one: 4 2 a. ns np б b. ns np (n -1)d 5 2 c. ns np d. ns е. nsarrow_forwardWhen a marble is dropped into a beaker of water, it sinks to the bottom. Which of the following is the best explanation? a. The surface area of the marble is not large enough to be held up by the surface tension of the water. b. The mass of the marble is greater than that of the water. c. The marble weighs more than an equivalent volume of the water. d. The force from dropping the marble breaks the surface tension of the water. e. The marble has greater mass and volume than the water. Justify your choice, and for choices you did not pick, explain what is wrong about them.arrow_forwardA 100.0 mL sample of 0.200 M aqueous hydrochloric acid is added to 100.0 ml of 0.200 M aqueous ammonia in a calorimeter whose heat capacity (excluding any water) is 480.0 J/K. The following reaction occurs when the two solutions are mixed. HCl(aq)+NH,(aq)-NH,CI(aq) The temperature increase is 2.34 °C. Calculate AH per mole of HCl and NH, reacted. Select one: a. 485 KJ/mol b. 1.96 KJ/mol o. 154 KJ/mol d. -1.96 KJ/mal e. -154 KJ/molarrow_forward
- Use decimal notation to express the following: a. 1.65×10-3 b. 3.37x104 c. 9.03×103 d. 2.50×10-5arrow_forwardRefer to the buret shown below. When recording this measurement for the volume of water, how many significant figures should you report? а. 2 b. 3 O.5 O d.4arrow_forwardDetermine what category "3 bananas" belong in for the following problem: "You bought $30 worth of bananas. How many bananas did you buy? Assume that bananas cost $0.59/lb and that there are 3 bananas per pound" A. Unit desired B. quantity C. part of a conversion factor D. none of thesearrow_forward
- The unit of volume in the metric system is the liter which consists of 1000 milliliters. How many liters or milliliters is each of the following common englsih system measurements approximatly equal to? a. a gallon of gasoline b a pint of milk c a cup if waterarrow_forwardWhich one of the following is not an SI base unit? .29 :Select one a. meter b. liter c. kelvin d. candela E. mole أخل اختیاری Not yet answered Marked out of 2.00 سؤال 5arrow_forwardVolume is an intensive property. Select one: a. False b. There is no way of knowing. c. True d. It depends on the substance.arrow_forward
- Convert the following metric quantities into the indicated units and round the final answer to the right number of significant figures (sig. figs.). a. 34 kg to g b. 7539.34 nm to kmarrow_forwardof significant figures contained in each of the following measurements: b. 25.0 mL c. 54.7 mL3 d. 8.5090 g e. 0.0831 g 2. Perform the following calculations and report the answers with appropriate units and the correct number of significant figures: a. 53.18 g+1.014 g +0.3270 g 54.1949+ l. o14g b. 10.35 cm x 4.15 cm x 1.10 cm : 54.5619 54.52 c. 36.140 g 4.08 mL 3.2 5784319 3. A student uses a stoppered 25.0-mL volumetric flask to determine the density of a liquid. The mass of the empty flask and stopper was 25.1841 g. The mass of the stoppered flask filled with liquid up to the scratch mark was 45.0379 g. Calculate the density of the liquid in appropriate units and with the correct number of significant figures. 4. Calculate the error and percent error of a sample of water using the following data: the actual density of water at 23 °C is 0.999765 g mL"' and the experimental density (at 23 °C) is 1.097 g mL'. Show your work and watch your significant figures. -1 ost-Lab Questions Based…arrow_forward1. Given the solid below, calculate the following: a. Volume b. Density if its mass is 104.72 g. 5.30 cm *2.5 cm 1.25 cmarrow_forward
- Chemistry for Today: General, Organic, and Bioche...ChemistryISBN:9781305960060Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. HansenPublisher:Cengage Learning