5.70 figures to reflect the three significant figures in the least precisely known quantity (5.70 L). These conversion factors are all exact and therefore do not limit the number of significant figures. CHECK The units of the answer are correct, and the magi inches is smaller than liters, so the volume in cubic inche in liters. FOR PRACTICE 1.9 How many cubic centimeters are there in 2.11 yds? FOR MORE PRACTICE 1.9 A vineyard has 145 acres of Chardonnay grapes. A parti 5.50 grams for every square meter of vineyard. How ma sunnlement are required for the entire vineyard? (1 km 2

The mass of a beaker is 5.333 g. After 5.00 mL of a concentated hydrochloric acid solution is pipet Ted into the beaker, the combined mass of the beaker and the hydrochloric acid sample is 11.229 g. From the data, what is the measured density of the hydrochloric acid solution?

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.

A homogeneous mixture was prepared by mixing 0.15 g A, 112.3 g B and the 24.55 g C.  The volume is found to be 85.80 cm3.  What is the density of the mixture to correct number of significant figures?

(a) A sample of tetrachloroethylene, a liquid used in dry cleaningthat is being phased out because of its potential to cause cancer,has a mass of 40.55 g and a volume of 25.0 mL at 25 °C. Whatis its density at this temperature? Will tetrachloroethylene floaton water? (Materials that are less dense than water will float.)(b) Carbon dioxide (CO2) is a gas at room temperature andpressure. However, carbon dioxide can be put under pressure tobecome a “supercritical fluid” that is a much safer dry-cleaningagent than tetrachloroethylene. At a certain pressure, the densityof supercritical CO2 is 0.469 g/cm3. What is the mass of a25.0-mL sample of supercritical CO2 at this pressure?

Using Two or More Conversion FactorsIt is often necessary to use several conversion factors in solving a problem. As an example,let’s convert the length of an 8.00-m rod to inches. The table on the back inside coverdoes not give the relationship between meters and inches. It does, however, give the relationshipbetween centimeters and inches 11 in. = 2.54 cm2. From our knowledge of SIprefixes, we know that 1 cm = 10-2 m. Thus, we can convert step by step, first from metersto centimeters and then from centimeters to inches:

A car travels at 55 mi/hmi/h and gets 12 km/Lkm/L of gasoline.   How many gallons of gasoline are needed for a 3.0-hour trip?   Express your answer to two significant figures.

Assigning Appropriate Significant FiguresThe state of Colorado is listed in a road atlas as having a population of 5,546,574 and an area of 104,091 square miles. Do thenumbers of significant figures in these two quantities seem reasonable? If not, what seems to be wrong with them?

The density of diethyl ether, a common organic solvent, is 0.706 g/mL.  What is the mass, in g, of 0.62 L of diethyl ether? Type the number only; omit the unit.  Round to two decimal places.

(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?