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It takes 16.6 min for a 10.0-mL sample of an unknown gas to effuse through a pinhole. A 10.0-mL sample of helium, He, required 5.00 min. What is the molecular weight of the unknown gas?
What is the molar enthalpy of solid sodium hydroxide reacts with an aqueous solution of hydrochloric acid, forming water amd an aqueous solution of sodium chloride?
A 7.45-L container holds a mixture of two gases at 35 °C. The partial pressures of gas A and gas B, respectively, are 0.368 atm and 0.852 atm.
nbspwhen titrating 0.15 m hcl with a calcium hydroxide solution of unknown concentration 35 ml of acid are required to
The combustion of one mole of benzene, C6H6, in oxygen releases 3268 kJ of heat. The products of the reaction are carbon dioxide and water.
What mass of Ar gas (in g) is contained in a 6.40 L tank in which its pressure is 0.703 atm and the temperature is 64.0°C? Do not enter units.
An unknown solid acid is either triprotic acid or diprotic tartaric acid. To determine which you titrate a sample of solid with NaOH. A 0.956g sample requires 29.1 ml of 0.513mol L -1 NaOH solution for titration to the equivalence point. What is t..
0.2 m hcl is used to neutralize 20 ml of 0.35 m naoh.a.how many moles of oh- are present?b.how many moles of h are
At 1.00 atm and 0 °C, a 5.04 L mixture of methane (CH4) and propane (C3H8) was burned, producing 18.0 g of CO2. What was the mole fraction of each gas in the mixture? Assume complete combustion.
An organic pesticide (MW 183.7) is 8.43% Cl. A 0.627 g sample containing the pesticide plus inert material containing no chloride was decomposed with metallic sodium in alcohol.
Determine which H atom transition (ninitial,nfinal) was responsible for the emission of a photon with a frequency of 6.91 x 1014 Hz.
if you mixed 100 ml of 0.1M KI with 100ml of 0.1M K2S2O8. How will you calculate the diluted (or "new") concentrations of them
calculate total heat in (J) needed to convert 0.333 mol of gaseous ethanol at 300 degress celsius and 1 atm to liquid ethanol at 25 degress celsius and 1 atm
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