CHM 111 Chapter 1 Problem Sheet (2) (1)

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CHM 111 Chapter 1 Problem Sheet (2) 1) A cube of an unknown metal measures 0.250 cm on one side. The mass of the cube is 0.095 g. Which of the following is most likely the unknown metal? 0.250cm=0.00250m V=side^3 =(0.00250m)^3 0.095g/(0.00250m)^3 ≈30.4g/cm^3 A) zirconium B) rhodium C) vanadium D) copper E) niobium 2) What is the volume (in cm 3 ) of a 36.7 g piece of metal with a density of 6.95 g/cm 3 ? 36.7g/ 6.95g/cm^3 A) 5.28 B) 255 C) 0.189 D) 6.34 E) 1.74 3) An object measuring 0.4500 kilograms will have a mass of ________ grams. 0.4500 kilograms×1000 grams/kilogram= 450.0g A) 450.0 B) 0.0004500 C) 45.00 D) 4.500 E) 2222 4) An object will sink in a liquid if the density of the object is greater than that of the liquid. The mass of a sphere is 9.83 g. If the volume of this sphere is less than ________ cm 3 , then the sphere will sink in liquid mercury (density = 13.6 g/cm 3 ). sphere 9.83g /13.6g/cm^3= 0.723cm^3

A) 0.723 B) 1.38 C) 134 D) 7.48 E) none of the above 5) Express the temperature, 275.18 K, in degrees Celsius. Temperature in K−273.15 275.18K−273.15=2.03C A) 548.33 °C B) 274.17 °C C) 2.03 °C D) 120.88 °C E) 22.78 °C 6) Which one of the following has the element name and symbol correctly matched? A) Ne, nitrogen B) Si, sulfur C) Ca, carbon D) Be, beryllium E) None of the symbols are correctly matched to the element name. 7) In the following list, only ________ is not an example of matter. A) book B) heat C) flower D) mouse E) neon 8) A 4.369 g sample of metal is placed in a flask. Water is added to the flask and the total volume in the flask is read to be 126.4 ml. The mass of the water, flask, and metal is 268.5 g. If the mass of the flask is 139.3 g and the density of water is 1.000 g/mL, the density of the solid is ________ g/cm 3 . 268.5g−139.3g=129.2g 129.2g/126.4 cm^3= 1.021g/cm³ A) 0.366 B) 1.56 C) 0.641 D) 2.78 E) 3.21 9) The density of mercury is 13.6 g/cm 3 . The density of mercury is ________ kg/m 3 .

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