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What mass of water could be heated by burning 1g of paraffin (wax) from 0 degrees celcious to 37 degrees celious when teh heat of combustion of paraffin is 10.0kcal per gram.
Potable water (drinking water) should not have manganese concentrations in excess of 0.05 mg/mL. If the manganese concentration is greater than 0.1 mg/mL, it imparts a foul taste to the water and discolors laundry and porcelain surfaces.
How much energy is evolved during the reaction of 32.5 g B2H6 and 72.5 g Cl2? Given: B2H6(g) +6Cl2 (g)---->2BCl3 (g) + 6HCl (g) DH -1396kj
If an unknown forms a silver mirror in the Tollens test, forms a purple color in the Schiff test, produces no precipitate in the iodoform test, has a refractvie index of 1.5250, and forms a semicarbazone melting at 124-126 C
A sample of neon effuses from a container in 77 seconds. The same amount of an unknown noble gas requires 157 seconds. identify the gas.
Stalactites--the long icicle, icicle like formations that hang from the ceilings of caves--are formed from recrystallizing minerals like calcite (calcium carbonate, CaCO3, 100.09 g/mol). The Ksp of calcium carbonate is 4.5 x 10^-9.
a star is estimated to have a mass of 2*10´36 kg. Assuming it to be a sphere of average radius 7 * 10´5 km, calculate the average density of the star in units of grams per cubic centimeter.
what is the molar mass of a gaseous element that Effuses through an opening of a box 1.12 times as fast as argon at the same temperature.
If 0.5110 g of H2C2O4 x 2H2O completely neutralized 41.39 mL of the stock NaOH soln what is the concentration of the NaOH solution?
Determine the oxidation of each element in the following compounds: a. CH3COO- b. NaClO3 c. Al2O3
ow many grams and how many moles of octane must be burned to release 450 kcal?
how many grams of aspiring were lost in the washing process you used to purify the product, assuming you used 50 mL of water for washing? The solubility of aspiring in water is 0.33 grams per 100 mL at room temperature?
Which one of these types of electromagnetic radiation has the shortest wavelength? infrared, ultraviolet,microwaves, or radio waves
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