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Concept explainers
(a)
Interpretation:
Whether the given statement on a relative scale, density is described as high rather than low describes a
(b)
Interpretation:
Whether the given statement on a relative scale, thermal expansion is described as very small rather than small describes a gas, a liquid, or a solid has to be indicated.
(c)
Interpretation:
Whether the given statement in general, the interactions between particles are very weak (almost zero) describes a gas, a liquid, or a solid has to be indicated.
(d)
Interpretation:
Whether the given statement in general, particles are far apart in a random arrangement describes a gas, a liquid, or a solid has to be indicated.
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Chapter 7 Solutions
EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- Make a conclusion: pH = 7,15 pCO₂ = 25 mmol/l 2 SB 11 mmol/l = BB = 27 mmol /1 BE = -17 mmol/larrow_forwardWhich of the following is not a characteristic of a primary standard material a. High molecular weight b. High purity usually above 99.5% c. Not reactive with air components d. low solubility in aqueous medium e. None below or abovearrow_forwardWhich of the following liquid substances exhibit the highest viscosity at 25 ºC? A. H3C−(CH2)4−CH2OH (hexanol) B. H3C−(CH2)3−CH2OH (pentanol) C. H3C−(CH2)4−COOH (hexanoic acid) D. All of the above have equal viscosities.arrow_forward
- Below is a Beer's Law Plot for the concentration of a specific colored compound x. A solution of compound X is measured with the spectrophotometer to have an optical density of 0.60. a) What is the concentration of compound X in this solution. Answers must contain proper units for full credit. b) The absorbance of this compound was measured at 540 nm. Why was this absorbance chosen? 0.9 0.8 0.7 0.6 805 4 0.4 0.3 0.2 Absorbance at 540 marrow_forwardHeliox is a helium‑oxygen mixture that may be used in scuba tanks for divers working at great depths. It is also used medically as a breathing treatment. A 5.25 L tank holds helium gas at a pressure of 1734 psi. A second 5.25 L tank holds oxygen at a pressure of 461.0 psi. The two gases are mixed in a 5.25 L tank. If the temperature remains the same throughout the process, what is the pressure of the gas mixture in the tank? Assume ideal gas behavior.arrow_forwardCasein in milk is an example of: a. gas in liquid where liquid is the dispersed phase and gas is the continuous phase b. solid in liquid where the liquid is the dispersed phase and the solid is the continuous phase c. solid in liquid, where solid is the dispersed phase and liquid is continuous phase d.gas in liquid where gas is dispersed phase and liquid is continuous phasearrow_forward
- a A metal that is in the liquid phase at room temperature. SiO2 b A compound that forms a network solid composed of covalently bonded atoms. CO2 c A gas that will dissolve in water due to dipole-Induced dipole forces. KNO3 d The solid-liquid equilibrium line on the phase diagram of this compound has a negative slope. Poly-ethylene ( a plastic) e A solid substance at STP, in which the particles are held together by Induced dipole-induced dipole forces. Graphite f A substance that will dissolve in water due to hydrogen bonding. H2O g A covalent network solid that has good electrical conductivity. NH3 h An amorphous solid. Hgarrow_forwardThe molecular weight of ethanol (CH3CH2OH) is46 and its density is 0.789 g/cm3.A. What is the molarity of ethanol in beer that is 5%ethanol by volume? [Alcohol content of beer varies fromabout 4% (lite beer) to 8% (stout beer).]B. The legal limit for a driver’s blood alcohol contentvaries, but 80 mg of ethanol per 100 mL of blood (usuallyreferred to as a blood alcohol level of 0.08) is typical. Whatis the molarity of ethanol in a person at this legal limit?C. How many 12-oz (355-mL) bottles of 5% beer coulda 70-kg person drink and remain under the legal limit? A70-kg person contains about 40 liters of water. Ignore themetabolism of ethanol, and assume that the water contentof the person remains constant.arrow_forwardConsider a solution which is 0.10 M in CH3COOH and 0.20 M in NaCH3coo. Which of the following statements is TRUE? A. If a small amount of NaOH is added, the pH decreases very slightly. B. If NaOH is added, the OH- ions react with the CH3CO0 ions. C. If a small amount of HCl is added, the pH decreases very slightly. D. If HCI is added, the H* ions react with CH3COOH ions. E. If more CH3COOH is added, the pH increases.arrow_forward
- The unknown metal sulfates are hygroscopic and will absorb water from air. The unknowns must thus be kept in desiccators to remove any absorbed water. Howwould your results be affected if your unknown sample was not desiccated? Would this error cause your calculation of the mass percent of sulfate in the unknown to be too high or too low? Explain.arrow_forwardMake a conclusion: pH = 7,25 pCO₂ = 75 mmol/l SB= 27 mmol/l BB = 49 mmol/l BE 2,5 mmol/l = TASK N 3arrow_forwardWhat is the concentration in % (w/v) of a solution prepared from 50.0 g NaCl and 2.5 L of water? A. 5.0 % B. 2.0 % O C. 0.020 % D. 0.050 % E. 0.50 %arrow_forward