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Estimate the density of Rb if it crystallizes in a body-centered cubic unit cell and has an atomic radius of 247.5 pm.
A sample of white gold is 18.0 grams gold, 3.0 grams silver, 2.0 grams cobalt, and 1.0 gram platinum by mass. What is the percent of platinum in the sample
Calculate the mass (g) of pure Na3AsO4 (s) and volume (mL) of 1.50 M HCl that are required to make 100.0 mL of a buffer solution at a pH of 6.80 and an H2AsO4-(aq) concentration of 0.100 M
2.9 mol Fe(OH)3 and 7.7 mol H2SO4 react according to the equation 2 Fe(OH)3 + 3H2SO4 -!> Fe2(SO4)3 + 6H2O. If the limiting reactant is Fe(OH)3, calculate the amount of Fe2(SO4)3 formed. Answer in units of mol.
if a gas occupies a volume of 5 L at 546 K and 2.5 atm, what is its volume at standard pressure and temperature.
If 3.7456g of synthesized aspirin is found to contain a 30.0% impurity of salicylic acid, what is the corrected experimental (or actual) yield
If 6.830 moles of an ideal gas has a pressure of 3.290 × 105 Pa and a volume of 0.105 m3, what is the temperature of the sample in degrees celsius
a gas has a volume of 1.75 L at -23 degrees Celsius and 150 kPa at what temperature will the gas occupy 1.30 L at 210 kPa
When a catalyst is added the reaction 2SO2(g)+O2(g)?2SO3(g) takes place. At equilibrium the total pressure is 4.05atm . Find the value of Kc.
what is happening when Nh4Cl is added to NH3 (a basic solution)? what is happening when HCl is added to NH3? how are these example
Assume that air pressure is 1.00 atm and the air temperature is 17.3 C. If the abolute zero apparatus is open to the air, how many moles of air will it hold?
Which of the following mixtures will be a buffer when dissolved in 1 liter of water?
Calculate the mass percent of copper(II) sulfate pentahydrate in the recovered sample.
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