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If the diameter of a sodium atom is 3.14x10^-8 cm, how many sodium atoms would fit along a line exactly 4.00inch long?
If 17.2 mL of 0.800 M~rm HCl solution are needed to neutralize 5.00 rm mL of a household ammonia solution, what is the molar concentration of the ammonia?
It dissolves via the reaction and the temperature of the solution increases to 28.0. Calculate the enthalpy change for this reaction per mole of X .
200 gmol of SO2 and 100 gmol O2 are fed to a reactor. Only 81 gmol of SO2 reacted according to 2SO2 + O2 → 2 SO3. Find the amount in mol fraction of SO2 that did not react?
What is the wavelength, in meters, of an alpha particle with a kinetic energy of 8.0 10-13 J. mass of an alpha particle = 4.00150 amu;
If this process is run until 3940 g of iron has been produced, how many grams of carbon dioxide will be produced along with the iron?
155 grams unkown substance was heated from 25.0c to 40c absorbed 5696j of energy what is the heat of the substance ?
Consider the following reaction carried out in a 2.0 L pressure vessel at 500K. calculate the final x value using quadratic formula.
A hydrocarbon mixture consists of 60.0% by mass of C3H8 and 40% of CxHy. When 10.0 g of this mixture is burned, 29.0 g CO2 and 18.8 g H2O are the only products. What is the formula of the unknown hy
An electrolytic cell is set up with Cd(s) in Cd(NO3)2 (aq) and Zn(s) in Zn(NO3)2 (aq). Initially both electrodes weigh 5.00g. After running the cell for a time the electrode in the one half cell wei
Under these conditions, what would be the effect on the following atomic spectral lines (viz. number of lines and line positions).
The volume of the gas is 201 mL measured at .989 atm. Calculate the number of grams of sodium used in the reaction. (Vapor pressure of water at 23°C = 0.0277 atm.)
Mom made the kids 2 L of Kool-Aid by mixing 5.0 g sugar (C12H22O11), 10.2 mg of Kool-Aid powder (a proprietary mixture of ingredients), and water. What is the concentration of sugar in the Kool-Aid
Calculate the pH of a solution made by adding 80. g of sodium acetate, NaCH3COO, to 39 g of acetic acid, CH3COOH, and dissolving in water to make 500. mL of solution.
8.533 x 1022 molecules of Strontium hydroxide (Sr(OH)2), how many milligrams would you need to weigh out?
You place 100 g of ethanol and 100 g of water in a refrigerator. Initially, both are at room temperature. Which of the two liquid samples will cool faster? explain why this happens.
a mixture of 0.200g of H2, 1.00g of N2, and 0.820 g of Ar is stored in a closed container at standard temperature and pressure. What is the volume of the container assuming that the gases exhibit id
A 25.0 mL sample of a 0.080 M solution of aqueous trimethylamine is titrated with a 0.10 M solution of HCl. Calculate the pH of the solution after 10.0, 20.0, and 30.0 mL of acid have been added; pK
The calcium ion from the resulting solution, an excess of potassium oxalate was added. The precipitate of calcium oxalate, CaC2O4, weighed 1.437 g. What was the molarity of CaCl2 in the solution?
How many milliliters of a 2.34M solution of glucose, C6H12O6, molar mass = 180.155 g/mol, do you need to obtain 25.0 g of glucose?
A gas mixture with a total pressure of 760mmHg contains each of the following gases at the indicated partial pressures: CO2. What is the partial pressure of the helium gas?
What is the sum of the stoichiometric coe?cients in the balanced equation? Do not forget to add the coe?cients that are 1.
A 2.77 L flask is filled with carbon monoxide at 27 °C until the pressure is 7.79 atm. Calculate the total pressure after 1.73 moles of carbon dioxide has been added to the flask. (R=0.082 L-atm
When 5.00 g of X is titrated with NaOH, it is found that X has two acidic hydrogens that react with NaOH and that 54.9 mL of 1.00 MNaOH is required to completely neutralize the sample. What is the m
A 34.0 g sample of nitrogen gas reacts with an excess of hydrogen gas to give an actual yield of 4.75 g NH3. What is the percent yield for this reaction? Reaction: N2(g) + 3 H2(g) ? 2 NH3(g).