Question 17 (1 point) Which of the following is an extensive property of oxygen?
ID: 1005670 • Letter: Q
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Question 17 (1 point) Which of the following is an extensive property of oxygen? a) boiling point O b) density O c) temperature O d) mass e) average kinetic energy of molecules Save Question 18 (1 point) A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is filled with concentrated sulfuric acid, H2SO4, its mass is 1026.57 g. What is the density of concentrated sulfuric acid? (Assume water has a density of 1.00 g/cm at the temperature of the measurement.) O a) 1.992 g/cm O b) 1.598 g/cm O c) 1.840 g/cm3 O d) 0.543 g/cm3 O e) 1.729 g/cm3 Save Question 19 (1 point) Acetone, which is used as a solvent and as a reactant in the manufacture of Plexiglas®, boils at 56.1°C. What is the boiling point in degrees Fahrenheit? O a) 159°F O b) 133°p O c) 101°F O d) 69.0oF O e) 43.4°F Save Question 20 (1 point) Select the answer that expresses the result of this calculation with the correct number of significant figures. 13.602x 1.90 x3.06 4.2x 1.4097 O a) 13.3568 O b) 13.357 O c) 13.36 O d) 13.4 O e) 13Explanation / Answer
7. d.mass
mass is extensive property. The property depends upon size or maas is called extensive
property.example mass ,volume , energy, entropy
18. C 1.84g/ml
The mass of water in the flask is : 593.63-78.23 = 515.4g
d = m/v
v = m/d
= 515.4/1 = 515.4ml
density of H2So4= m/v
mass of H2So4 = 1026.57-78.23 =948.34g
d H2So4 = 948.34/515.4 = 1.84g/ml
19. b 133F
F = C*9/5 + 32
= 56.1*9/5 +32 = 133F
20. e.13
21. e.62.40g
22. C. 9.6*10^4
23. c 269.0186cm
24. b.0.056
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