9 F ? F C 32 F 5 C = + 3 9 F 6.3 10 C 32 F 5 C = + = 4 ? F 1.1 10 F (d) Conversion from Fahrenheit to Celsius. 9 F ? F C 32 F 5 C = + 9 F 11.5 C 32 F 5 C = + = ? F 11.3 F (c) Conversion from Celsius to Fahrenheit. CHAPTER 1: CHEMISTRY-THE STUDY OF CHANGE 3 5 C = (105 32) F 9 F = ? C 41 C (b) Conversion from Celsius to Fahrenheit. (a) Conversion from Fahrenheit to Celsius. Substitute the temperature values given in the problem into the appropriate equation. mass density volume = Solution: mass = density volume 0.798 g 17.4 mL 1 mL =mass of ethanol 13.9 g 1.23 5 C ? C = ( F 32 F) 9 F (a) 5 C ? C = (95 32) F 9 F = 35 C (b) 5 C ? C = (12 32) F 9 F = 11 C (c) 5 C ? C = (102 32) F 9 F = 39 C (d) 5 C ? C = (1852 32) F 9 F = 1011 C (e) 9 F ? F C 32 F 5 C = + 9 F ? F 273.15 C 32 F 5 C = + = 459.67 F 1.24 Strategy: Find the appropriate equations for converting between Fahrenheit and Celsius and between Celsius and Fahrenheit given in Section 1.7 of the text. Rearrange the density equation, Equation (1.1) of the text, to solve for mass. 1.14 (a) K (b) Sn (c) Cr (d) B (e) Ba (f) Pu (g) S (h) Ar (i) Hg 1.15 (a) element (b) compound (c) element (d) compound 1.16 (a) homogeneous mixture (b) element (c) compound (d) homogeneous mixture (e) heterogeneous mixture (f) homogeneous mixture (g) heterogeneous mixture 1.21 mass 586 g volume 188 mL =density 3.12 g/mL 1.22 Strategy: We are given the density and volume of a liquid and asked to calculate the mass of the liquid. CHAPTER 1: CHEMISTRY-THE STUDY OF CHANGE2 1.13 Li, lithium F, fluorine P, phosphorus Cu, copper As, arsenic Zn, zinc Cl, chlorine Pt, platinum Mg, magnesium U, uranium Al, aluminum Si, silicon Ne, neon. The salt can be recovered unchanged by evaporation. Photosynthesis changes water, carbon dioxide, etc., into complex organic matter. The orange juice concentrate can be regenerated by evaporation of the water. The helium isn't changed in any way by leaking out of the balloon. When uranium undergoes nuclear decay, the products are chemically different substances. The measurement of the densities of lead and aluminum does not change their composition. The measurement of the boiling point of water does not change its identity or composition. The fertilizer is consumed by the growing plants it is turned into vegetable matter (different composition). Oxygen gas is consumed in a combustion reaction its composition and identity are changed. 1.4 (a) hypothesis (b) law (c) theory 1.11 (a) Chemical property. Even though numbers are involved, they are not the result of measurement. If the numerical values for the densities of ice and water were given, it would be a quantitative statement. There is no numerical scale of measurement for artistic excellence.
This statement clearly involves a measurable distance.
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