Chapter 9, Problem 2P

An analysis of 0.7 kg dry soil sample (having a volume of 500 mL) showsthat sample contains 35 mg naphthalene (C10H8). Based on the results of this analysis.a) What is the density of the soil in g/cm3?b) What is the concentration of naphthalene in this sample in terms of mass percentage (%m/m) and ppmm?

Arterial blood pressure is traditionally measured in mm Hg. And the style pressure of 85 mm Hg it’s considered borderline between normal and high blood pressure convert this pressure to kPa units. ( 1atm =760 mm Hg= 101.33 kPa )

The average normal body temperatureis generally accepted as 98.6 °F. What is the temperature in °C and K?

(A) if both sentences are true, (B) if both sentences are false, (C) if the first sentence is true but the second is false, and (D) if the first sentence is false but the second is true. 1. Water appears in nature in all three common states of matter. Water is a tasteless, odorless liquid at standard temperature and pressure. 2.  The addition of salt in the distilling mixture made the water impure and saline. The addition of 5 drops of the silver nitrate solution into the distillate determines whether the distillate is impure or pure water. 3. The ideal electrical conductivity of totally pure water is 0.055 microSiemens, whereas typical deionized water has an electrical conductivity of 0.1 microSiemens. The freezing point of water at 1 atm is 100degC.  4.  From the air, oxygen can slowly diffuse across the water’s surface from the surrounding atmosphere, or be mixed in quickly through aeration, whether natural or man-made. The aeration of water can be caused by wind (creating waves),…

Chemical conversions 1. What is the molecular weight of nitrobenzene, often known as C_6*H_5*O_2*N?  2. How many moles of nitrobenzen are contained in 50.0 g? 3. What is a substance's density in grammes per cubic centimetre if its specific gravity is 1.203? 4. How much space is filled by 50.0 g of nitrobenzene in cubic metres, feet, and inches? 5. What is the pressure at the base of a cylindrical container holding nitrobenzene that has a base that is 1 inch in diameter? What does gauge pressure mean? 6. How many molecules of nitrobenzene are in 50.0 g?

Calculate the equivalent weight (EW) and normality (N) for a solution of H3PO4 given the following equations. The molarity of H3PO4 is given in brackets. Pick the answers from the options given (RMM H3PO4 = 98)                                            A(5M) B   (0.5M)

In Experiment 1, two chemical compounds are introduced. Sodium hydroxide, or NaOH, is a basic compound, with a molecular weight of about 40 g/mol. Phenolphthalein is a colored indicator that turns pink in the presence of a base. Its molar mass is almost eight times the mass of sodium hydroxide, at about 318 g/mol. Based on what you know about diffusion, which hypothesis best describes which molecule is more likely to move across the semipermeable membrane in this process?

2 things about water treatment (NOT WASTEWATER)

What is the normality of a KOH solution given the following experimental data:                         Weight of KHP (204.23 g/mol) = 0.5000 g                         Volume of KOH used = 23.45 mL                         Volume of HCl used = 1.55 mL                         1.000 mL HCl = 1.131 mL KOH