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Q:
The enthalpy of combustion of benzoic acid is "26.4 kJ/g. What is the enthalpy of combustion expressed in joules per kilogram?A) -2.64 x 103J/kgB) -2.64 x 104J/kgC) -2.64 x 101J/kgD) -2.64 x 107J/kgE) -2.64 x 1010J/kg
Q:
Convert 6424.2g to mg.A) 64.242 mgB) 642.42 mgC) 6.4242 x 106mgD) 6.4242 x 103mgE) 6.4242 mg
Q:
6.7 kilogram(s) contains this many grams:A) 6.7 x 102B) 0.67C) 6.7 x 10-3D) 67E) 6.7 x 103
Q:
Which of the following sequence of conversions will yield the correct number of scruples in 14.3lb? Some equivalents that may be helpful are given below:
_ 1.00 scruple = 20.0 grains
_ 1.00 g = 15.4 grains
_ 1.00 grain = 0.0648 g
_ 1.00 lb = 453.6 g
_ 1.00 kg = 2.205 lb
A) B) C) D) E)
Q:
A car averages 27.5miles per gallon of gasoline. How many liters of gasoline will be needed for a trip of 489km? Some conversion factors that may be helpful are the following:1 qt = 0.946 L1 mile = 1.609 km4 qt = 1 gal (exact)1 ft = 12 in (exact)A) 4.18 x 101 LB) 5.72 x 103LC) 2.21 x 103LD) 1.08 x 102LE) 3.16 x 104L
Q:
The distance from Austin, Texas, to Lincoln, Nebraska, is 822miles by car. Which of the following series of calculations will yield this distance in units of kilometers?(1 in = 2.54 cm (exact), 1 mi = 5280 ft (exact), 1 ft = 12 in (exact))A) B) C) D) E)
Q:
The average speed of oxygen molecules at 690ºC is 1.60 x105cm/s. Which of the following calculations would convert this speed to units of miles per hour?A) B) C) D) E)
Q:
Which response has the correct number of significant figures and units for the following mathematical operation?A) 2.201 x 10-5J/calB) 2 x 10-5kcalC) 2.201 x 10-5kcalD) 2.20 x 10-5kcalE) 2.2 x 10-5kcal
Q:
Convert 34.59 cm3to cubic inches (in3) given that 1 inch = 2.54 cm (exact).
A) 2.111 in3
B) 13.62 in3
C) 87.86 in3
D) 566.8 in3
E) 0.4738 in3
Q:
How many feet (ft) are contained in 0.399 km, given that 1 mi = 1.609 km and 5280 ft = 1 mi (exact).
A) 1310 ft
B) ft
C) ft
D) 3390 ft
E) ft
Q:
A 4.06 cm3sample of solid sodium metal has a density of 0.968 g/cm3. What volume does this sample of sodium occupy in its liquid state? The density of liquid sodium is 0.927 g/cm3.
A) 4.24 cm3
B) 3.89 cm3
C) 4.52 cm3
D) 3.64 cm3
E) 0.257 cm3
Q:
What is the mass of H2SO4in a 47.5-cm3sample of sulfuric acid that has a density of 1.33g/cm3and consists of 45.6% H2SO4?
A) 139 g
B) 63.2 g
C) 16.3 g
D) 1.28 g
E) 28.8 g
Q:
What is the mass of NH3in a 80.0-cm3sample that has a density of 0.92 g/cm3and consists of 20% (by mass) NH3?
A) 15 g
B) 20 g
C) 45 g
D) 74 g
E) 25 g
Q:
What length of a cylindrical piece of tungsten wire having a radius of 2.35mm has a mass of 92.3g? The density of tungsten is 19.25g/cm3.A) 2.76 x10-3mB) 3.08 x102mC) 2.76 x10-1mD) 3.62 x10-2mE) 3.62 x10-4m
Q:
A thin sheet of platinum metal that is 2.68cm by 6.16cm has a mass of 48.8g and a thickness of 1.40mm. What is the density of platinum?A) 21.1 g/cm3B) 2.11 g/cm3C) 1.13 x103g/cm3D) 0.0474 g/cm3E) 0.474 g/cm3
Q:
What volume of a pure liquid (density 0.710g/mL) has a mass of 0.290kg?A) 4.08 x102mLB) 2.45 x10-3mLC) 2.06 x10-1mLD) 2.45 mLE) 4.08 x10-1mL
Q:
Four cubes of equal mass are made of lead (density = 11.3 g/cm3), silver (10.5 g/cm3), iron (7.90 g/cm3), and aluminum (2.70 g/cm3). Which cube has the longest edge?
A) lead
B) iron
C) silver
D) all four cubes have the same length edge
E) aluminum
Q:
Calculate the mass of gold that occupies the same volume as 62.9 g of cobalt. The density of cobalt is 8.90 g/cm3and the density of gold is 19.30g/cm3.A) 2.73 gB) 136 gC) 1.08 x104gD) 0.0345 gE) 0.366 g
Q:
A 0.412-kg sample of methylene chloride has a density of 1.326 g/cm3. Calculate its volume.
A) 3220 cm3
B) 0.000311 cm3
C) 412 cm3
D) 311 cm3
E) 546 cm3
Q:
In addition to mass, which property of matter must be known to calculate its volume?
A) specific heat
B) temperature
C) molecular weight
D) density
E) pressure
Q:
An irregularly shaped metal was weighed by the following difference:
Watch glass + metal = 56.7813 g
Watch glass = 35.4725 g
The volume of the metal was determined by placing the metal in a graduated cylinder that had water in it and measuring the volume difference.
Graduated cylinder + water + metal = 14.15 mL
Graduated cylinder + water = 11.25 mL
The density should be reported as
A) 7.348 g/mL.
B) 7.35 g/mL.
C) 7.4 g/mL.
D) 7.3 g/mL.
E) 7.3479 g/mL.
Q:
A piece of metal (mass = 17.676g) is placed in 11.00mL of chloroform (d= 1.498 g/mL) in a 25-mL graduated cylinder. The chloroform level increases to 15.46 mL. The best value for density of this metal from these data is
A) 1.14 g/mL.
B) 2.65 g/mL.
C) 3.963 g/mL.
D) 5.94 g/mL.
E) 3.96 g/mL.
Q:
A particular sheet of paper measures inches. What is the surface area of one side of the paper in cm2? (2.54 cm = 1 in exactly)A) 1.1 x102cm2B) 4.4 x101cm2C) 2.8 x102cm2D) 1.7 x101cm2E) 6.8 cm2
Q:
The specific heat is the amount of heat required to raise the temperature of one gram of a substance one degree Celsius. A 75.0-g sample of an unknown substance absorbed 2.93 kJ of energy as it changed from a temperature of 23.2ºC to 95.4ºC. What is the specific heat of the unknown substance?A) 541 kJ/(g·ºC)B) 0.541 J/(g·ºC)C) 5.41 kJ/(g·ºC)D) 54.1 kJ/(g·ºC)E) 0.541 kJ/(g·ºC)
Q:
What is the volume of a cube that has an edge length of 0.019m?A) 6.9 x10-3m3B) 6.9 x10-3km3C) 6.9 x10-3cm3D) 6.9 x10-3mm3E) 6.9 cm3
Q:
Which of the following is an incorrect statement regarding derived SI units?A) The SI unit of volume is derived from the SI unit of length.B) One milliliter is equivalent to one cubic centimeter.C) A derived SI unit may also contain a non-SI unit.D) Density is a derived SI unit.E) The SI unit of energy (joule) is equivalent to kg·m2·s-2.
Q:
The Rankine (oRa) temperature scale is often used in engineering. Like the Kelvin scale, the Rankine scale is an absolute temperature scale; but the size of a Rankine degree is the same as the size of a Fahrenheit degree. Thus, 0 K = 0oRa and 0oF = 459.67oRa. What is the temperature 225.3oRa expressed on the Fahrenheit scale?A) 685.0oFB) 865.2oFC) 498.5oFD) 225.3oFE) -234.4oF
Q:
The Rankine (oRa) temperature scale is often used in engineering. Like the Kelvin scale, the Rankine scale is an absolute temperature scale; but the size of a Rankine degree is the same as the size of a Fahrenheit degree. Thus, 0 K = 0oRa and 0oF = 459.67oRa. What is the temperature 12.9oC expressed on the Rankine scale?
A) 514.9oRa
B) 286.1oRa
C) 12.9oRa
D) 23.2oRa
E) 296.4oRa
Q:
The melting point of a particular solid is 2923K. This corresponds toA) 4802ºF.B) 3196ºC.C) 2589ºC.D) 4738ºF.E) 1504ºF.
Q:
The melting point of a certain solid is -25ºC. This corresponds toA) 13ºF.B) -32ºF.C) -13ºF.D) -103ºF.E) 18ºF.
Q:
The melting point and the normal boiling point of water can be used to calibrate thermometers. What are these respective temperatures in kelvins?
A) 273 and 373
B) 32 and 212
C) 100 and 273
D) 0 and 100
E) 0 and 373
Q:
A particular liquid boils at -287ºF. What is its boiling point on the Kelvin scale?A) 131 KB) 114 KC) 96 KD) 146 KE) 214 K
Q:
The melting point of a solid is 39ºF. This corresponds toA) 295 K.B) 312 K.C) 286 K.D) 277 K.E) 312 K.
Q:
The melting point of nitrogen is 63 K. What is this temperature in degrees Celsius?A) 63ºCB) -336ºCC) -63ºCD) -210ºCE) 483ºC
Q:
The boiling point of chlorine is 172 K. This temperature corresponds toA) -82ºC.B) 101ºC.C) 172ºC.D) -172ºC.E) -101ºC.
Q:
8.86 seconds contain this many nanoseconds.A) 8.86 x109B) 8.86 x1010C) 8.86 x1012D) 8.86 x108E) 8.86 x107
Q:
6.6 seconds contain this many picoseconds.A) 6.6 x109B) 6.6 x1012C) 6.6 x10"9D) 6.6 x10"12E) 6.6 x1015
Q:
The mass of 59 kg equalsA) 590 g.B) 5900 g.C) 5.9 x104g.D) 0.059 g.E) 0.59 g.
Q:
Which of the following sets of units is not in the order of increasing size?A) cPa < dPa < kPaB) L < dL < LC) ns < ms < sD) pm < mm < nmE) g < mg < cg
Q:
How many 150-mg aspirin tablets can be made from 15.0kg of aspirin?
A) 10,000,000
B) 1,000,000
C) 1000
D) 10,000
E) 100,000
Q:
One-thousandth of a microgram isA) 10-12g.B) 10-8g.C) 10-6g.D) 10-9g.E) 10-10g.
Q:
Which is the largest mass?
A) 10 dg
B) 10 cg
C) 10 pg
D) 10 ng
E) 10 mg
Q:
Order the four metric units from smallest to largest.
1) joule 2) centijoule 3) nanojoule 4) millijoule
A) 1) < 2) < 4) < 3)
B) 3) < 4) < 2) < 1)
C) 4) < 3) < 2) < 1)
D) 2) < 3) < 1) < 4)
E) 1) < 2) < 3) < 4)
Q:
The distance between atoms is sometimes given in picometers, where 1 pm is equivalent to 1x10-12m. If the distance between the layers of atoms in a particular compound is given as 344pm, what is the distance in cm?A) 3.44 x10-6cmB) 3.44 x10-14cmC) 3.44 x10-12cmD) 3.44 x10-8cmE) 3.44 x10-10cm
Q:
In the area of nano-chemistry, particles defined as nanoparticles range in size from 1-2500 nm. 1 nm is equivalent to 1x10-9m. If the size of the particles that make up a particular material is 6.47x10-8cm, what is this size in nanometers?A) 64,700 nmB) 6.47 nmC) 0.647 nmD) 6470 nmE) 647 nm
Q:
A student is working on converting a number that has a unit with the SI prefix milli- to a unit that has the prefix mega-. Using your knowledge about the relative sizes that milli- and mega- represent, how should the student convert the number?
A) The student should multiply the number by 109.
B) The student should multiply the number by 106.
C) The student should divide the number by 106.
D) The student should use the number as is.
E) The student should divide the number by 109.
Q:
Which of the following statements concerning the common temperature scales is/are true?1) Fahrenheit is an absolute temperature scale.2) The normal boiling point of water (100ºC) is equal to 273 K.3) The difference between the boiling point and freezing point of a substance is the same for the Celsius and the kelvin scales.A) 1 onlyB) 2 onlyC) 3 onlyD) 2 and 3E) 1, 2, and 3
Q:
Which of the following statements concerning the SI system is/are correct?1) Prefixes are used to indicate a power of ten multiplier for a given SI base unit of measurement.2) Degrees Celsius (ºC) is the SI base unit for temperature.3) The kilogram (kg) is the SI base unit for mass.A) 1 onlyB) 2 onlyC) 3 onlyD) 1 and 3E) 1, 2, and 3
Q:
The radius of a circle is measured to be 2.65cm. How should the circle's area be reported? (A=r2)A) 22.1 cm2B) 22.062 cm2C) 22.06182 cm2D) 22.0618 cm2E) 22.06 cm2
Q:
The answer that should be reported for the total mass of solution when 98.66mg of benzene is added to 8.98g of toluene is
A) 9.07866 g.
B) 9.08 g.
C) 9.0787 g.
D) 9.079 g.
E) 9.1 g.
Q:
Four samples were weighed using three different balances. (All are as accurate as the precision indicates.) The masses are 0.94 kg, 58.2 g, 1.55 g, and 250 mg. The total mass should be reported as
A) 1.000 kg.
B) 1.0000 kg.
C) 1.00 kg.
D) 1.00000 kg.
E) 1.0 kg.
Q:
The measurements of three different masses on three different balances are 1.21 kg, 536 mg, and 23.14 g. The total mass should be reported asA) 1233.68 g.B) 1234 g.C) 1233.7 g.D) 1.23 x103g.E) 1233.676 g.
Q:
Three different samples were weighed using a different type of balance for each sample. The three were found to have masses of 0.5183761kg, 9.342mg, and 5076.6g. The total mass of the samples should be reported as
A) 5595.0 g.
B) 5595 g.
C) 5594.985 g.
D) 5594.985442 g.
E) 5594.9854 g.
Q:
The best answer to report for 171.95 - 82.1609 is _____.A) 90B) 89.7891C) 89.789D) 89.8E) 89.79
Q:
What is the best answer to report for ?
A) 2.252 g/mL
B) 2.2518 g/mL
C) 2.3 g/mL
D) 2.25 g/mL
E) 2.25183 g/mL
Q:
What is the correct answer to the following expression?_5.45 x 10"10+ 5.74 x 10"12A) 5.5074 x 10"10B) 5.507 x 10"10C) 6 x 10"10D) 5.5 x 10"10E) 5.51 x 10"10
Q:
What is the best answer to the following expression involving a sum of measurements?
(85.430cm + 0.400cm + 31.3cm)
A) 117 cm
B) 117.1300 cm
C) 117.13 cm
D) 117.130 cm
E) 117.1 cm
Q:
The mass of a sample is measured by difference: first the mass of a beaker is measured (73.0g), and a small amount of the sample is added to the beaker. The mass of the sample plus beaker is then measured to be 77.169g. The number of significant figures that should be reported for the mass of the sample is
A) 2.
B) 1.
C) 5.
D) 4.
E) 3.
Q:
How many significant figures should be reported for the difference between 235.6708mL and 235.57mL?
A) 7
B) 1
C) 2
D) 3
E) 5
Q:
What is the best answer to the following expression?(55.78cm + 0.829cm + 4.6666cm - 52.4cm)A) 9 cmB) 8.8756 cmC) 8.876 cmD) 8.88 cmE) 8.9 cm
Q:
Express the number 0.000460 in scientific notation.
A) B) C) D) E)
Q:
Express the result of the following calculation in scientific notation: 0.0263cm2 88.2cmA) B) C) D) E)
Q:
Express the result of the following calculation in scientific notation: 301cmx439cmA) B) C) D) E)
Q:
The correct value of the expression is
A) B) C) D) E)
Q:
How many significant figures are there in the number 0.04560700?
A) 4
B) 9
C) 8
D) 5
E) 7
Q:
How many significant figures are there in the number 8.400?A) 1B) 5C) 3D) 4E) 2
Q:
The number of significant figures in 0.070700 x10"4 isA) 6.B) 4.C) 3.D) 7.E) 5.
Q:
How many significant figures are there in the measured value 69.380?
A) 2
B) 3
C) 6
D) 5
E) 4
Q:
How many significant figures are there in the value 0.0863m?
A) 4
B) 3
C) 2
D) 5
E) 6
Q:
The number of significant figures in 1.9124 x 10"1 dm isA) 5.B) 6.C) 3.D) 7.E) 4.
Q:
Two students determined the volume of a glass container three separate times (see table below). The true volume of the container is 24.20 mL. Which statement correctly describes the students' results?Student AStudent B24.3 mL24.89 mL24.4 mL24.87 mL24.5 mL24.88 mLA) Student A's results are the most accurate. Student B's results are the most precise.B) Student A's results are the most accurate and precise.C) Student B's results are the most accurate and precise.D) Student A's results are the most precise. Student B's results are the most accurate.E) The precision and accuracy of the two data sets are identical.
Q:
Which of the following statements concerning accuracy and precision is/are correct?
1) It is possible for a series of measurements to be both precise and inaccurate.
2) Accuracy is a measure of how close multiple measurements are to each other.
3) The more significant figures in a measurement the more accurate the measurement.
A) 1 only
B) 2 only
C) 1 and 2
D) 2 and 3
E) 1, 2, and 3
Q:
The figure below represents the bull's eye target for an archer. The black dots represent where the archer's arrows hit: How can this archer be described?
A) precise but not accurate
B) accurate and precise
C) neither accurate nor precise
D) accurate but not precise
E) cannot be described from the data presented
Q:
The property of a series of repeated measurements that is most directly related to precision is
A) the number of place holders in each measurement.
B) the reproducibility of each measurement.
C) the exactness of each measurement.
D) the accuracy of each measurement.
E) the number of significant figures in each measurement.
Q:
The term that is related to the reproducibility (repeatability) of a measurement is
A) accuracy.
B) qualitative.
C) quantitative.
D) precision.
E) property.
Q:
All the following are characteristic properties of phosphorus. Which one is a chemical property?A) When exposed to air, white phosphorus will burn spontaneously, but red phosphorus will not.B) Red phosphorus and white phosphorus are solid allotropic forms.C) The white form is soluble in liquid carbon disulfide but is insoluble in water.D) The red form of phosphorus is insoluble in both water and carbon disulfide.E) The red form melts at about 600ºC, and the white form melts at 44ºC.
Q:
Which of the following is a chemical property of tin?A) It is easily malleable.B) It melts at 232ºC.C) It conducts electricity.D) Its density is 7.31g/cm3.E) It dissolves in certain acids.
Q:
The boiling of water is a
A) physical change because the water merely disappears.
B) chemical change because heat is needed for the process to occur.
C) physical change because the gaseous water is chemically the same as the liquid.
D) chemical and physical change.
E) chemical change because a gas (steam) is given off.
Q:
Which of the following is an example of a chemical change?
A) silver tarnishing
B) iodine sublimating
C) alcohol boiling
D) sucrose dissolving
E) sodium chloride melting
Q:
Which of the following is an example of a chemical change?
A) alcohol evaporating
B) water boiling
C) skin burning in the sun
D) iodine vaporizing
E) ice melting