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A compound contain 82.7% C and 17.3% hydrogen. The density of its vapor at STP is 2.59 g/L. Assume the molecular mass of O2 is 32.0. What is the molecular formula of the compound?
A 0.3288 g sample of a hydrocarbon(a compound of carbon and hydrogen ) was burned in air. The samplewas completely converted to 1.0562 g of carbon dioxide and0.5046 g of water. Find the emprical formula of the compound.
Determine the equilibrium concentrations - what are the new equilibrium concentrations of all species.
what is the terminal settling velocity for a particle with a diameter of 1 mm and a density of 2.5 gcm3 suspended in
whats the thermochemical equation that represent the formation of
The reaction caused the temperature of the solution to rise from 22.06 C to 26.42 C. If the solution has the same density and specific heat as water, what is deltaH for this reaction (per mole of H2O produced)?
Concentrations of flouride in drinking water grerater than 4.0 mg/L can cause mottled teeth in children. What is 4.0 mg/L expressed as molality
Question- Calculate the pH at the equivalence point for the titration of 0.140 M methylamine (CH3NH2) with 0.140 M HCl. The Kb of methylamine is 5.0× 10-4.
How much 0.100 M HC2H3O2 and 0.100 M NaC2H3O2 are required to prepare 20.0 mL of a buffer with a pH of 5.000
air monitoring provides the following contaminant concentrations at the approximate center of a fire scene in which
If the charge on the metal remained the same and nitrogen was substituted for oxygen, what would the formula and systemic name for the compound be
After a solution of RuCl3 . 5H2O has stood for about ayear, addition of AgNO3 (aq) precipitates 3 mol of AgCl per mole ofcomplex. What has happened in the ensuing time
A sample of chemical X is found to contain 5.0 grams of oxygen 10.0 grams of carbon, and 20.0 grams of nitrogen. The law of definite proportion would predict that a 78 gram sample of chemical X must contain how many grams of carbon
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