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A quantity of oxygen occupies a volme of 19.2L at STP. How moles of oxygen are present?
What is the density of a block of marble that occupies 253 cm and has a mass of 752 g? Answer in units of g/cm
Calculate the molar concentration of OH - ions in an 01.33 M solution of hypobromite ion, BrO- (Kb = 4.0 10-6).
Sodium chlorate,NaClO3, decomposes when heated to yield sodium chloride and oxygen, a reaction used to provide oxygen for the emergency breathing masks in many airliners
Rank from longest to shortest distance. To rank the items as equivalent, overlap them.
A mixture of 82.0 g of magnesium (24.31 g/mol) and 350 g of iron(III) chloride (162.2 g/mol) is allowed to react. What mass of magnesium chloride (95.21 g/mol) can be formed?
Commercial vinegar was tritrated with NaOH solution to determine the content of acetic acid (HC2H3O2). For 20.0 milliliters of vinegar, 32.0 milliliters of 0.500 molar NaOH solution was required. What was the concentration of acetic acid in the vi..
What is the chemical make-up of natural cleaners? How do these products compare to traditional cleaners? Are the active ingredients the same or different?
At 700.°C, the total pressure of the system is found to be 3.63 atm. If the equilibrium constant KP is 1.52, calculate the equilibrium partial pressures of CO2 and CO.
How many grams of NH4Cl must be added to 424 mL of a 0.69 M solution of NH3 to prepare a pH = 9.00 buffer.
A large number of polycyclic benzenoid aromatic hydrocarbons are known. One of these, benz/a/pyrene, is a powerful carcinogen found in tobacco smoke.
Brass is a copper and zinc alloy containing 31.8% zinc by mass and having a density of 8.73 {\rm \frac{g}{cm^3}}. A fitting composed of common brass has a total volume of 335.6 {\rm cm^3}
when 3.02g NH4Cl solid was dissolved in 20.05 ml water the temperature of the water dropped from 19.8 degrees celcius to 9.1 degrees celcius
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