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The flask was then shaken until the solution was uniform. A 25.0-sample of this glucose solution was diluted to 0.500 . How many grams of glucose are in 100. of the final solution?
A 1.55 sample of propane, C3H8, was burned ina bomb calorimeter whose total heat capacity if 12.3kJ/ degrees Celsius. The temperature of the calorimeter plus its contents increased form 21.36 degree
If 24 mL of 7.0 M H2SO4 was spilled, what is the minimum mass of NaHCO3 that must be added to the spill to neutralize the acid?
Calculate the initial concentration of H2O2 and KI for each run (trials 1-7). use the concentrations and volumes below:
if 135 g of steam at 100 degrees C and 475 g of ice at 0 degrees C are combined, what is the temperature of the resultant water, assuming that no heat is lost?
How do you calculate the mass of magnesium that is required to produce 35.8ml of hydrogen gas at 28°c and a barometric pressure of 745 mmHg when collected over water?
How much rations must the hiker consume to avoid a reduction in body temperature of 4.0 K as a result of heat loss? Assume the heat capacity of the body equals that of water. Assume the
What is the mole fraction of ethanol in a solution made by dissolving 14.6 g of ethanol in 53.6 g of water?
A nuclear power plant operating at 40.0% efficiency produces 1072 MW of usable power. What is the energy in joules released by the fission of a single uranium-235 atom?
Thomas poured 25 mL of 0.60 M HCl into a large bottle. He then added enough water so that the new (diluted) concentration was 0.10 M HCl. How much water did Thomas add?
How many molecules of carbon dioxide are produced when 130 molecules of acetylene (HCCH) to react in excess oxygen produce carbon dioxide and water
The half-life of C-14 is 5730 years. A 3.4 g sample of bone has 33.3 disintegrations per minute. How old is the bone sample in years?
Calculate the enthalpy change associated with the conversion of 25.0 grams of ice at -4.00°C to water vapor at 110.0°C.
If the volume of a container is 69.4 L. and the container holds a gas at 23.2 oC. and 7.00x104 mmHg. The density of the gas is 16.88 g/L.
Phenyl-methane-sulfonyl-fluoride (PMSF) inactivates serine proteases by binding covalently to the catalytic serine residue at the active site; this enzyme-inhibitor bond is not cleaved by the enzyme
A sample contains BaCl2.2H2O and NaCl. After 0.678 g of sample was heated and residue weighted 0.648 g. What is the percent of BaCl2.2H2O in the sample?
Buffer capacity = moles of H+ or OH consumed/ change in ph x volume of buffer solution. Okay how do I find the moles of H+ or OH consumed?
0.780 g of aluminum sulfate was mixed with 0.400 g of barium chloride. A white precipitate barium sulfate was formed.
If you take a 10.5mL portion of the stock solution and dilute it to a total volume of 0.350 L, what will be the concentration of the final solution?
Calculate the enthalpy change (H) of the reaction for per mole patassium carbonate. Assume the specific heat of all solutions are 4.18 J/g.oC and all solutions have a density =1.0 g/mL.(10.2kJ/mol)
Minimum energy needed to eject an electron from a sodium atom is 4.41 x 10(-19) j. what is the maximum wavelength of light, in nonometers that will cause this effect with sodium?
When 4.0 mL of concentrated NaK solution is diluted into 100.0 ml, the final concentration is 0.056 M, what is the initial concentration?
A sample contains BaCl2.2H2O and NaCl. The total mass of the sample is 1.500g. After the sample was heated, the residue weighs 1.353 g.
There are 3 compounds with the formula C2H2Br2. Two of the 3 have dipole moments, and one does not. Draw the structures of all three compounds and tell which has no dipole moment.