Concept explainers
Of the 90 or so naturally occurring elements, only four are liquidnearroom temperature: mercury
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CHEMISTRY-TEXT
- The following are properties of substances. Decide whether each is a physical property or a chemical property. a Chlorine gas liquefies at 35C under normal pressure. b Hydrogen burns in chlorine gas. c Bromine melts at 7.2C. d Lithium is a soft, silvery-colored metal. e Iron rusts in an atmosphere of moist air.arrow_forwardMercury freezes at 38.9C. What is the coldest temperature, in degrees Fahrenheit, that can be measured using a mercury thermometer?arrow_forwardConvert the following Celsius temperatures to Kelvin and to Fahrenheit degrees. a. the temperature of someone with a fever, 39.2C b. a cold wintery day, 25C c. the lowest possible temperature, 273C d. the melting-point temperature of sodium chloride, 801Carrow_forward
- The following data refer to the element phosphorus. Classify each as a physical or a chemical property. (a) It exists in several forms, for example, white, black, and red phosphorus. (b) It is a solid at 25C and 1 atm. (c) It is insoluble in water. (d) It burns in chlorine to form phosphorus trichloride.arrow_forwardClassify each of the following as (1) a physical property, (2) a physical change, (3) a chemical property, or (4) a chemical change. a. the process of decomposing hydrogen peroxide b. the fact that a block of ice can be chipped into smaller pieces c. the process of evaporating a liquid d. the fact that water freezes at 32Farrow_forward1.14 Which part of the following descriptions of a compound or element refers to its physical properties and which to its chemical properties? (a) Calcium carbonate is a white solid with a density of 2.71 g/cm. It reacts readily with an acid to produce gaseous carbon dioxide. (b) Gray powdered zinc metal reacts with purple iodine to give a white compound.arrow_forward
- What is the reason behind this? Inorder to measure the temperature of a object accurately, simple liquid-in-glass thermometer must be at the same temperature as the object.arrow_forward6.Matter is classified as followsa)Ätoms and molecules b) Pure substances and mixtures. c)Ähomogeneous and heterogeneous substances d)True and non-true solutions e)Acids and basesarrow_forward5) How many minutes is required for sunlight to travel from the Sun to Mars? (Assume the Sun is 1.14 x 10^8 km from Mars and that sunlight travels at 2.99 x 10^5 km/s.)(a) 0.00437 minutes (b) 0.157 minutes(c) 6.35 minutes (d) 381 minutes(e) 22,900 minutes Step by step use the conversion factors with starting point and put lines in between the numbers and cancel the units 6) Platinum is one of the most dense elements (d = 21.5 g/cm^3). What is the volume of a 10.0 g sample of the metal?(a) 0.465 cm^3(b) 2.15 cm^3(c) 21.5 cm^3(d) 215 cm^3(e) 465 cm^3 Step by step, use the conversion factors with starting point and put lines in between the numbers and cancel the units 7) A rare metal alloy is a superconductor at 77 K. What is the temperature in °C ?(a) -350°C (b) -196°C(c) -77°C (d) 196°C(e) 350°C Step by step use the conversion factors with starting point and put lines in between the numbers and cancel the units 8) The average distance from the Earth to the Sun is 1.50 x 10^8km.…arrow_forward
- 5) How many minutes is required for sunlight to travel from the Sun to Mars? (Assume the Sun is 1.14 x 10^8 km from Mars and that sunlight travels at 2.99 x 10^5 km/s.)(a) 0.00437 minutes (b) 0.157 minutes(c) 6.35 minutes (d) 381 minutes(e) 22,900 minutes Step by step use the conversion factors with starting point and put lines in between the numbers and cancel the units 6) Platinum is one of the most dense elements (d = 21.5 g/cm^3). What is the volume of a 10.0 g sample of the metal?(a) 0.465 cm^3(b) 2.15 cm^3(c) 21.5 cm^3(d) 215 cm^3(e) 465 cm^3 Step by step, use the conversion factors with starting point and put lines in between the numbers and cancel the units 7) A rare metal alloy is a superconductor at 77 K. What is the temperature in °C ?(a) -350°C (b) -196°C(c) -77°C (d) 196°C(e) 350°C Step by step use the conversion factors with starting point and put lines in between the numbers and cancel the units 8) The average distance from the Earth to the Sun is 1.50 x 10^8km.…arrow_forwardIf a monolayer of stearic acid has a mass of 2.5*10^-5 g and occupies a surface area of 82 cm^2, what is the height of the monolayer, in cm? The density of stearic acid is 0.839 g/cm^3.arrow_forwardWhich substance can be separated by filtration? A. Compound B. Element C. Mixture D. Solution Which is an example of physical property of matter? * A. Baking a cake B. Cooking of gelatin C. Melting of ice D. Rusting of metal Which is an example of chemical property of matter? A. Digestion of food B. Evaporation of water C. Sublimation of moth balls D. Condensation of water vapor Which is a physical property of matter? A. Combustibility B. Corrosiveness C. Density D. Reactivityarrow_forward
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