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1) Carbon Monoxide is a toxic pollutant found in our city air. On a particular day, the air contains 6.50 mg of CO per 1.000 X 10^3 cubic meter of air. How many grams of CO are present in a room whose dimensions are 15.0 meters x 11.0 meters X16.5 meters? Show steps and also unit conversions within steps (e.g. what did you multiply or divide by to convert 6.50 mg to kg?).2) Archimedes' principle states that when an object is immersed in a fluid, the buoyant force is equal to the weight of the fluid displaced by object. The weight of an object is equal to its mass times the acceleration due to gravity. Therefore, the weight of the fluid displaced is equal to the volume of the fluid displaced times the density of the fluid times the acceleration due to gravity. Weight (N, Newtons) = mass (kg) X g. At sea level, g = 9.81 m/s squared. Question: A cube of lead (density = 11.3 X 10^3 kg/m cubed) is placed in a pool of mercury (density = 13.6 X 10^3 kg/m cubed). The cube of lead is 3.60 X 10^2 cm on a side. Calculate the percentage of the cube that is above the pool of mercury. Show unit conversions and complete formulas while solving for grams of CO present in the room.
How many valence electrons are there for the POCl3 molecule? Draw a reasonable Lewis structure for POCl3. Assign formal charges for the atoms in your Lewis structure
If 138 mL of wet H2 is collected over water at 24°C and a barometric pressure of 748 torr, how many grams of Zn have been consumed? (The vapor pressure of water is 22.38 torr at 24°C.)
A gas is heated from 14 degrees celsius to 121 degrees celsius and the volume increased from 15.0 liters to 41.4 liters. If the original pressure is 1 atm, what would the final pressure be?
One useful method for recycling scrap aluminum converts some of it to common alum [potassium aluminum sulfate dodecahydrate, KAl(SO4)212 H2O], an important dye fixative and food preservative.
A buffer was prepared by adding 2.4 g of ammonium nitrate to 100 mL of 0.30 M ammonia (Kb = 1.8 x 10^-5). To this solution was then added 10.0 mL of 0.30 M sodium hydroxide, what is the new pH
Compare lattice energies of LiI and PbI2 and calculate the formation enthalpy in each case by constructing a Born-Haber cycle. Which one is more ionic? Comment.
A 0.4016 g sample of impure sodium carbonate (soda ash) is dissolved in 50 mL of distilled water. Phenolphthalein was added and 11.40 mL of 0.09942 M HCL was required to reach the first end point. How many moles of NaOH were used in the back titrat..
How many milliliters of a stock solution of 11.0 NHO3 would you have to use to prepare 0.320 of 0.350 NHO3
the reaction a b --gt p at temperature 25degc is the secondorder reaction with the rate constant k. the initial
Calculate the pH at the equivalence point for the titration of 0.10 M perchloric acid. (pKb for NH3= 4.74, consider the change in volume before and after reaction)
A one-gram sample of wood taken from a living tree gives a rate forcarbon-14 decay of 13.6 counts per. If the half-life for carbon-14is 5720 years, Explain how old is a wood sample that gives a rate for carbon-14 decay of 3.9 counts per minute?
Give structures and names of all benzene derivatives that theoretically can have the indicated number of derivatives.
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