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When a weather balloon started to ascend, the temperature was 28°C and the pressure 90,64 KPa. If the maximum temperature achieved was -36°C at 53,3 KPa, what percentage of the final volume was the initial volume if the balloon was totally expanded ?
A 10.0 ml sample of aqueous HCl requires 18.66 ml of 0.206M NaOH to reach the endpoint . What is the molar concentration of HCl ? The chemical equation of the reaction is
The alpha particles emitted by radon-222 have an energy of 8.8 x 10^-13 J. If a 200. g Pb brick absorbs 1.0 x 10^10 alpha particles from radon decay, what dose in rads will the brick absorb
two ideal gases a and b are at the same temperature volume andpressure. gas a is reversibly expanded at constant
A gas occupying a volume of 695 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?
a hypothetical ax type ceramic material is known to have a density of 2.10gcm3 and a unit cell of cubic symmetry with a
Balance the equations using the oxidation-reduction reaction. Identify the half-equations if it is oxidation or reduction.
When heated, KClO3 solid forms solid KCl and O2 gas. A sample of KClO3 is heated and 226 mL of gas with a pressure of 744 mmHg is collected over water, at 26°C. At 26°C, the vapor pressure of water is 25 mmHg.
When a 0.528 g sample of a compound containing only carbon, hydrogen, and oxygen is burned, 0.306 g of water and 0.815 g of carbon dioxide are formed. What is the empirical formula for this compound?
What volume of HCl is required to reach the equivalence point and what is the pH at the equivalence point. c. Calculate the pH of the solution after adding 5.00, 15.0, 20.0, 22.0, and 30.0 mL of HCl.
how many grams of dry nh4cl need to be added to 2.40 l of a 0.400 m solution of ammonia nh3 to prepare a buffer
Determine the required CSTR volume, V (in gallons), and hydraulic residence time, in V/Q (hours), to comply with the current industrial pretreatment permit limitation for phenol
How many molecular orbitals will be formed by combination of the 3s and 3p atomic orbitals in 1.0 mol of Mg atoms. At 0 K, what fraction of these orbitals will be occupied by electron pairs (all orbitals filled up to the Fermi level)
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