3. Perform the following calculation and report the answer to the proper numbers of significant figures. _a.) 14.5 + 0.023 _b.) 13.265 - 2.065 _c.) (5.5 x 10-6)2 _d.) (7.613 х 108) (1.0132 х 10-2) e.) (1.552 х 10-2), (1.6 х 103)
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- Consider multiplying “26.2” by “16.43.” What would a mathematician say the answer is? What would a scientist say? Justify the scientist’s answer, not merely citing the rule, hut explaining it.How to properly use significant figures in this case?Ccal = (-ΔHrxn x nLR)/ΔTCcal = (-55.85 kJ/mol x 0.00100 mol)/5.3°CCcal = ?????? It would help if you can clarify the rules for multiplication and division. Thanks!density of unknown liquid initial mass of erlenmeyer flask 119.528 g final mass of erlenmeyer flask 127.382 g mass of water 10.00 g volume of water 10.00 mL what is denisty of unknown liquid? average density of liquid g/mL, show calculations:
- Volume of water in cylinder 21.6 mLMass of empty beaker 75.360 gMass of beaker with water 97.315 gMass of water in beaker ______ gDensity of water _______ g/mLCalculate the average density you determined for this unknown liquid and record below. [_________ g/mL +_________ g/mL] / 2 = _____________g/mLA group of five students attempted to estimate 100 g of a substance by balancingthe amount of the substance with a 100-g standard mass and obtained the followingmasses after each estimated amount was weighed: 95.8634 g, 80.8125 g, 106.5078g, 98.2865 g, and 86.4453 g. Create a data table as shown below and use the datato determine the answers to the following questions:Mass (g) Deviation (g) % Deviation Error (g) % Errora) What is the mean? And what is the true value?b) What are the deviation and % deviation from the mean for each value?c) What are the error and % error for each value?What is the Density of Cl2 is represented by 18.8L at 2.68atm 23.9°C Express your answer to 2 decimal places and use the proper abbreviation for the Units
- A student obtains the following data: a- Mass of evaporating dish 21.345 g b- Mass of evaporating dish and saturated NaCl solution 42.817 g c- Mass of dish and NaCl after evaporation 38.915 g Report the Mass % of NaCl in this solution. Write the number as a percentage with the correct number of significant figures as shown. (i.e. 25%) There should be no space between the numbers and the % sign.(a) How many significant figures should be reported for thevolume of the metal bar shown here? (b) If the mass of thebar is 104.72 g, how many significant figures should be reportedwhen its density is determined using the calculatedvolume?The mass unit associated with density is usually grams. If the volume (in mLmL or cm3cm3) is multiplied by the density (g/mLg/mL or g/cm3g/cm3) the volume units will cancel out, leaving only the mass units. Keep in mind that the volume and density must use the same volume unit for the cancellation. If a large marshmallow has a volume of 3.00 in3in3 and density of 0.242 g/cm3g/cm3, how much would it weigh in grams? 1 in3=16.39 cm31 in3=16.39 cm3.
- Chemistry A student performed the same experiment as you. The following data was recorded in their lab notebook. Mass of Mg, g Final buret volume, mL Pbarometric, in Hg PH2O, torr T, °C 0.035 41.86 27.02 17.5 20.0 Calculate the student's experimental value of R. Round your answer to four places after the decimal.A wooden object has a density of 12 g/mL and a volume of 7 mL. What is the mass of this object? 3. A lab measures a piece of crumpled aluminum and finds its mass to be 14.3g and itʼs volume to be 5.26mL. Later on, they have a second piece of crumpled aluminum, which has a mass of 12.3g. Whatʼs the volume of the second piece?density of water initial mass of erlenmeyer flask 123.221 g final mass of erlenmeyer flask 133.203 g mass of water 10.00 g volume of water 10.00 mL what is denisty of water? average density of water g/mL, show calculations: