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A 309 mL sample of unknown HCl solution reacts completely with Na_2CO_3 to form 10.1 g CO_2. What was the concentration of the HCl solution?
what volume would a 0.0236-mole sample of helium gas would occupy at a temperature of 24degc and a pressure of 0.750
The "Zebra" cell was invented in 1985 in South Africa as part of the "ZEolite Battery Research Africa" project, and is used in all-electric municipal buses and other vehicles.
Calculate the final temperature of the mixture, assuming no heat is lost. The heat capacities of Hg and H2O are 27.98 and 75.33 J/mol/K, respectively.
Mario Molina for their work concerning the formation and decomposition of ozone in the stratosphere. Rowland and Molina hypothesized that chlorofluorocarbons (CFCs) in the stratosphere break down upon exposure to UV radiation, producing chlorine a..
which of the following is a neutralization reaction? 2no2 --> 2no-> + 02, h2o+so3-->h2so4, hno3 +koh-->h2o+kno3, 4na+o2 --> 2na2o, kcl+nano3--> kno3 + nacl
The final temperature of the water and iron was 48.4oC. Assuming that the calorimeter itself absorbs a negligible amount of heat, what was the mass
A sample of oxygen gas has a volume of 545 mL at 35°C. The gas is heated to 151ºC at constant pressure in a container that can contract or expand. What is the final volume of the oxygen gas
A gas is confined to a container with a massless piston at the top. A massless wire is attached to the piston. When an external pressure of 2.00 atm is applied to the wire, the gas compresses from 4.40 to 2.20L
heptapeptide upon HCL hydrolysis produced equimolar amounts of ASP, CYS, GLU, LYS, PHE, TYR, VAL and ammonia. Exposure of the intact heptapeptide to FDNB followed by hydrolysis produced DNP-VAL
A mass of G grams of a liquid are placed in a closed 15 liter, fixed-wall container. The molecular weight of the liquid is 18 g mol-1. Its molar heat of vaporization is 44 kJ mol-1. Its normal boiling point is 373 K. A scientist measures the press..
Calculate the osmotic pressure generated when 14.6 grams of estrogen are dissolved in 275 ml of a benzene solution at 298 K. What is the molarity and osmotic pressure
Sulfur and fluorine react in a combination reaction to produce sulfur hexafluoride: The maximum amount of SF6 that can be produced from the reaction of 3.5 g of sulfur with 4.5 g of fluorine is
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