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The daily dose of ampicllin for the treatment of an ear infection is 115mg/kg of body weight. What is the daily dose for a 34 lb child?
What is the empirical formula of a hydrocarbon if completecombustion or 7.000 mg of the hydrocarbon produced 22.781 mg ofCO2 and 6.994 mg of H2O? Be sure to write Cfirst in the formula.
A chiral carboxylic acid A (C5H6O2) reacts with 1mol of hydrogen gas on catalytic hydrogenation. the product is anachiral carboxylic acid B (C5H8O2). What are the structures of Compounds A and B?
Eighty-six proof whiskey is 43 percent ethylalcohol, CH3CH2OH, by volume.If the density of ethyl alcohol is 0.79 kg/L, what is its molarity in whiskey?
When 95.0g of an unknown metal are submerged in water in a graduated cylinder, the water level rises from 32.2 ml to 49.5 ml. calculate the density of the metal.
Ethylene diamine tetra-acetic acid (EDTA) is awater-soluble compound that readily combines with metals, such ascalcium, magnesium, and iron. The molecular formula for EDTA isC10N2O8H16. Assume one E
Elemental (metallic) aluminum (Al) is reactedwith HCl to yield aluminum chloride (AlCl3) and hydrogen gas (H2). How many grams of metallic aluminum would be required to produce 1 gram of pure hydro
A column of mercury is contained in a cylindrical tube. Thistube has a diameter of 8.0mm, and the height of the mercury columnis 1.20m.
A 25 mL sample containing Cu2+ gave an instrumentsignal of 23.6 units (corrected for a blank). When exactly 0.5 mLof 0.0287 M Cu(NO3)2 was added to thesolution, the signal increased to 37.9 units.
When a 1.25-gram sample of limestone was dissolved in acid, 0.44gram of CO2 was generated. If the rock was dissolved in acid, carbonate other than CaCO3, what was the percent of CaCO3 by mass in the
The only swimming pool at the El Cheapo Motel is outdoors. It is 5m wide and 12 m long. If the weekly evaporation is 2.35 in, howmany gallons of water must be added to the pool if it does notrain?
A 500 mL bottle of water, at room temp. 25ºC, is poured over120 g of ice that is at -8ºC. What will the final temperature of the water when the ice has melted, assuming that it is in an in
You have made up a solution of 100 mM Tris, pH 7.0. The pKa of Tris is8.0. Compared to the situation at pH 7.0, about how many more H+ions are there if you were to adjust the solution to pH 6.0 by a
A truck driver used sand to soak up a 1 g spill of lindane(C6H6Cl6). He placed tehcontaminate soil in an open drum which then filled up with 150 L ofrain water during a rainstorm. You test the water
A sample of propane (C3H8) is placed in a closed vessel together with an amount of O2 that is 3.00 times the amount needed to completelyoxidize the propane to CO2 and H2O at constant temperature.
Calculate the pressure exerted by Ar for a molar volume of 1.42L mol-1 at 300.0 K using the van der Waals equation of state. The van derWaals parameters a and b for Ar are 1.355 bar dm6 mol-2 and 0.
1 g of Magnesium sulfate is mixed with 1 L of distilled water. Magnesium sulfatre is 20.2% Magnesium by mass. What is the hardness of the water in grains per gallon?
If an equal number of moles of gas is allowed to escape rapidlyfrom each tank, the temperature of the butane tank will be lower than that of the propane tank.
A cylinder storing oxygen at 20 MPa at 0 degrees Celcius mightexplode if the pressure exceeds 50 MPa. What is the maximumtemperature that this cylinder can safely be stored?
A chamber is filled with gas and pressurized to 2 atm(g) and then is connected to a second chamber filled with the same gas at 0 (zero) atm (g) pressure. The final pressure is measured to be 1 atm(
How much energy (in J) is required to excite a hydrogen atom from its ground state to its first excited state? What is the wavenumber of the radiation that would be absorbed in this transition?
Calculate the mass of magnesium needed to generate 80.0 mL of H2gas. Assume a temperature of 22.0 °C and a pressure of 760.0 Torr.Mg + 2 HCl -> MgCl2 + H2
If the paradichlorobenzene sublimes, how will this affectthe calculation of the molar mass of your unknown? Explain why the freezing point of a pure solvent hasa "plateau" instead of a continuous down
A student dissolve 1.00 gram of product in 50ml H2O. the di stribution coeffcient of the compound in ether and H2O is five. how much of the student's compound will be extract by one 60ml portion of
0.9 moles of an ideal gas with Cv = 3R/2, initially confined to a container of volume 6 litre and at a temperature 42 C, expand (or are compressed) against a constant external pressure of 1.2 atm un