Problem 1PS: In the following scenario, identify which of the statements represents a theory, law, or hypothesis.... Problem 2PS: State whether the following is a hypothesis, theory, or law of science. Global climate change is... Problem 3PS: What is meant by the phrase sustainable development? Problem 4PS Problem 5PS Problem 6PS Problem 7PS: Give the name of each of the following elements: (a) C (b) K (c) CI (d) P (e) MG (f) Ni Problem 8PS: Give the name of each of the following elements: (a) Mn (b)Cu (c) Na (d) Br (e) Xe (f) Fe Problem 9PS: Give the symbol for each of the following elements: (a) barium (b) titanium (c) chromium (d) lead... Problem 10PS: Give the symbol for each of the following elements: (a) silver (b) aluminum (c) plutonium (d) tin... Problem 11PS: In each of the following pairs, decide which is an element and which is a compound. (a) Na or NaCl... Problem 12PS: In each of the following pairs, decide which is an element and which is a compound. (a) Pt(NH3)2Cl2... Problem 13PS: An 18 g sample of water is decomposed into 2 g of hydrogen gas and 16 g of oxygen gas. What masses... Problem 14PS: A sample of the compound magnesium oxide is synthesized as follows. 60. g of magnesium is burned and... Problem 15PS: In each case, decide if the underlined property is a physical or chemical property. (a) The color of... Problem 16PS: In each case, decide if the change is a chemical or physical change. (a) A cup of household bleach... Problem 17PS: Which part of the description of a compound or element refers to its physical properties and which... Problem 18PS: Which part of the description of a compound or element refers to its physical properties and which... Problem 19PS: The flashlight in the photo does not use batteries. Instead, you move a lever, which turns a geared... Problem 20PS: A solar panel is pictured in the photo. When light shines on the panel, it generates an electric... Problem 21PS: Determine which of the following represent potential energy and which represent kinetic energy. (a)... Problem 22PS Problem 23PS: A hot metal block is plunged into water in a well-insulated container. The temperature of the metal... Problem 24PS: A book is held at a height above the floor. It has a certain amount of potential energy. When the... Problem 25GQ Problem 26GQ: Iron pyrite (fool's gold, page 11) has a shiny golden metallic appearance. Crystals are often in the... Problem 27GQ: Which observations below describe chemical properties? (a) Sugar is soluble in water. (b) Water... Problem 28GQ: Which observations below describe chemical properties? (a) Sodium metal reacts violently with water.... Problem 29GQ: The mineral fluorite contains the elements calcium and fluorine and can have various colors,... Problem 30GQ: Azurite, a blue, crystalline mineral, is composed of copper, carbon, and oxygen. (a) What are the... Problem 31GQ: You have a solution of NaCI dissolved in water. Describe a method by which these two compounds could... Problem 32GQ: Small chips of iron are mixed with sand (see photo). Is this a homogeneous or heterogeneous mixture?... Problem 33GQ: Identify the following as either physical changes or chemical changes. (a) Diy ice (solid CO2)... Problem 34GQ: Identify the following as either physical changes or chemical changes. (a) The desalination of sea... Problem 35GQ: In Figure 1.2 you see a piece of salt and a representation of its internal structure. Which is the... Problem 36GQ: In Figure 1.5 you see macroscopic and particulate views of the element bromine. Which are the... Problem 37GQ Problem 38GQ: The following photo shows copper balls, immersed in water, floating on top of mercury. What are the... Problem 39GQ: Categorize each of the following as an element, a compound, or a mixture. (a) sterling silver (b)... Problem 40GQ: Categorize each of the following as an element, a compound, or a mixture. (a) air (b) fluorite (c)... Problem 41GQ: Make a drawing, based on the kinetic-molecular theory and the ideas about atoms and molecules... Problem 42GQ: Make a drawing, based on the kinetic-molecular theory and the ideas about atoms and molecules... Problem 43GQ: Hexane (C6H14, density = 0.766 g/cm3), perfluoro-hexane (C6F14, density = 1.669 g/cm3), and water... Problem 44GQ: You have a sample of a white crystalline substance from your kitchen. You know that it is either... Problem 45GQ: You can figure out whether a solid floats or sinks if you know its density and the density of the... Problem 46GQ: You are given a sample of a silvery metal. What information could you use to prove the metal is... Problem 47GQ: Milk in a glass bottle was placed in the freezing compartment of a refrigerator overnight. By... Problem 48GQ: Describe an experimental method that can be used to determine the density of an irregularly... Problem 49GQ: Diabetes can alter the density of urine, so urine density can be used as a diagnostic tool.... Problem 50GQ Problem 51GQ: The following photo shows the element potassium reacting with water to from the element hydrogen, a... Problem 52GQ Problem 53GQ: Four balloons are each filled with a different gas, each having a different density: If the density... Problem 54GQ Problem 55GQ: The photo below shows elemental iodine dissolving in ethanol to give a solution. Is this a physical... Problem 57GQ: A few years ago a young chemist in Vienna, Austria, wanted to see just how permanent the gold was in... Problem 1RCYU: The distance between two carbon atoms in diamond (Figure 2) is 0.154 nm. What is this distance in... Problem 2RCYU: A student checked the accuracy of two standard top-loading balances by testing them with a standard... Problem 3RCYU Problem 4RCYU: The density of gold is 19,320 kg/m3. What is this density in g/cm3? Problem 5RCYU: A particular paint has a density of 0.914 g/cm3. You need to cover a wall that is 7.6 m long and... Problem 1.1RA: What is the fuel density in units of kg/L? Problem 1.2RA: What mass and what volume of fuel should have been loaded? (1 lb = 453.6 g) Problem 2.1RA: Confirm that a person swimming at the world record rate for the 50-m freestyle would travel 2.4 mm... Problem 2.2RA: At this world record rate, how long would it take for a swimmer to travel 3.0 cm?
Problem 2.3RA Problem 1RPS: Many laboratories use 25C as a standard temperature. What is this temperature in kelvins? Problem 2RPS: The temperature on the surface of the Sun is 5.5 103 C. What is this temperature in kelvins? Problem 3RPS Problem 4RPS: Make the following temperature conversions: Problem 5RPS: A marathon distance race covers distance of 42.195 km. What is this distance in meters? In miles? Problem 6RPS: The average lead pencil, new and unused, is 19 cm long. What is its length in millimeters? In... Problem 7RPS: A standard U.S. postage stamp is 2.5 cm long and 2.1 cm wide. What is the area of the stamp in... Problem 8RPS: A compact disc has a diameter of 11.8 cm. What is the surface area of the disc in square... Problem 9RPS: A typical laboratory beaker has a volume of 250. mL What is its volume in cubic centimeters? In... Problem 10RPS: Some soft drinks are sold in bottles with a volume of 1.5 L What is this volume in milliliters? In... Problem 11RPS: A book has a mass of 2.52 kg. What is this mass in grams? Problem 12RPS: A new U.S. dime has a mass of 2.265 g. What is its mass in kilograms? In milligrams? Problem 13RPS: Ethylene glycol, C2H6O2, is an ingredient of automobile antifreeze. Its density is 1.11 g/cm3 at 20... Problem 14RPS: A piece of silver metal has a mass of 2.365 g. If the density of silver is 10.5 g/cm3, what is the... Problem 15RPS Problem 16RPS: Which occupies a larger volume, 600 g of water (with a density of 0.995 g/cm3) or 600 g of lead... Problem 17RPS: You are on a diet that calls for eating no more than 1200 Cal/day What is this energy in joules? Problem 18RPS: A 2-in. piece of chocolate cake with frosting provides 1670 kJ of energy. What is this in dietary... Problem 19RPS Problem 20RPS Problem 21RPS: You and your lab partner are asked to determine the density of an aluminum bar. The mass is known... Problem 22RPS: The accepted value of the melting point of pureaspirin is 135 C. Trying to verify that value, you... Problem 23RPS Problem 24RPS Problem 25RPS Problem 26RPS Problem 27RPS: To determine the average mass of a popcorn kernel, you collect the following data: Plot the data... Problem 28RPS: Use the following graph to answer the following question: (a) What is the value of x when y=4.0? (b)... Problem 29RPS: Use the graph below to answer the following questions. (a) Derive the equation for the straight... Problem 31RPS: Solve the following equation for the unknown value, C. (0.502)(123) = (750)C Problem 32RPS: Solve the following equation for the unknown value, n. (2.34)(15.6) = n(0.0821)(273) Problem 33RPS: Solve the following equation for the unknown value, T. (4.184)(244)(T 292.0) + (0.449)(88.5) Problem 34RPS Problem 35RGQ: Molecular distances are usually given in nanometers (1 nm = 1 109 m) or in picometers (1 pm = 1 ... Problem 36RGQ: The separation between carbon atoms in diamond is 0.154 nm. What is their separation in meters? In... Problem 37RGQ: A red blood cell has a diameter of 7.5 m (micrometers). What is this dimension in (a) meters, (b)... Problem 38RGQ: The platinum-containing cancer drug cisplatin (Study Question 35) contains 65.0 mass-percent of the... Problem 39RGQ Problem 40RGQ: You need a cube of aluminum with a mass of 7.6 g. What must be the length of the cube's edge (in... Problem 41RGQ: You have a 250.0-mL graduated cylinder containing some water. You drop three marbles with a total... Problem 42RGQ Problem 43RGQ: The smallest repeating unit of a crystal of common salt is a cube (called a unit cell) with an edge... Problem 44RGQ: Diamond has a density of 3.513 g/cm3. The mass of diamonds is often measured in carats, where 1... Problem 45RGQ Problem 46RGQ: The density of pure water at various temperatures is given below. Suppose your laboratory partner... Problem 47RGQ Problem 48RGQ: The aluminum in a package containing 75 ft2 of kitchen foil weighs approximately 12 ounces. Aluminum... Problem 49RGQ: Fluoridation of city water supplies has been practiced in the United States for several decades. It... Problem 50RGQ: About two centuries ago, Benjamin Franklin showed that 1 teaspoon of oil would cover about 0.5 acre... Problem 51RGQ Problem 52RGQ: A 26-meter-tall statue of Buddha in Tibet is covered with 279 kg of gold. If the gold was applied... Problem 53RGQ: At 25 C, the density of water is 0.997 g/cm3, whereas the density of ice at 10 C is 0.917 g/cm3.... Problem 54RGQ: Suppose your bedroom is 18 ft long and 15 ft wide, and the distance from floor to ceiling is 8 ft 6... Problem 55RGQ: A spherical steel ball has a mass of 3.475 g and a diameter of 9.40 mm. What is the density of the... Problem 56RGQ: You are asked to identify an unknown liquid that is known to be one of the liquids listed below. You... Problem 57RGQ: You have an irregularly shaped piece of an unknown metal. To identify it, you determine its density... Problem 58RGQ: There are five hydrocarbon compounds (compounds of C and II) that have the formula C6H14. (These are... Problem 59RGQ: Suppose you have a cylindrical glass tube with a thin capillary opening, and you wish to determine... Problem 60RGQ: Copper: Copper has a density of 8.96 g/cm3 An ingot of copper with a mass of 57 kg (126 lb) is drawn... Problem 61RGQ: Copper: (a) Suppose you have a cube of copper metal that is 0.236 cm on a side with a mass of 0.1206... Problem 62RGQ: You set out to determine the density of lead in the laboratory. Using a top loading balance to... Problem 63RIL: A sample of unknown metal is placed in a graduated cylinder containing water. The mass of the sample... Problem 64RIL: Iron pyrite is often called fool's gold because it looks like gold (see page 11). Suppose you have a... Problem 65RIL: You can analyze for a copper compound in water using an instrument called a spectrophotometer. [A... Problem 67RIL