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A standard iron solution is 0.1491 M Fe(II), your dichromate solution is 0.0189 M dichromate, and it took 26.01 mL of your standard iron solution to titrate the excess dichromate in an unknown. What is the chemical oxygen demand of the sample, in units of mg O2/L?
aluminum may be formed by the passage of 60,714 C through an electrolytic cell that contains a molten aluminum salt.
100g (water) that increases temperature from -100 degrees Celsius to 200 degrees Celsius. How much energy in a Kilo Joule is absorbed?
Calculate the molarity and mole fraction of acetone in a 1.26 m solution of acetone (CH3COCH3) in ethanol (C2H5OH). (Density of acetone = 0.788 g/cm3; density of ethanol = 0.789 g/cm3.) Assume that the volumes of acetone and ethanol add.
The mass of a cube of gold with one side measuring 150. cm is ______ kg. The density of gold is 19.32 g/cm3
Kc = 9.7 at 900 K for the reaction NH3(g) + H2S(g) --> NH4HS(s) If the initial concentrations of NH3(g) and H2S(g) are 2.0 M, what is the equilibrium concentration of H2S(g)?
how many moles of magnesium oxide are produces by the reaction of 3.82g of magnesium nitride with 7.73g of water? how many grams of excess reactant is left over?
Methane and hydrogen sulfide form when 36g H2 texts with carbon disulfide. Calculate the percent yield if the actual yield of CH4 is 69.8g.
It requires 251 J to melt 2.22 g of sodium metal at its normal melting point of 98°C. Calculate the molar heat of fusion of sodium.
What is its speed in cm/sec? (b) How far in meters would it travel in 2.00 days? (c) If a snail weighs 2.00 grams, how many snails would it take to make a firkin at sea level?
How much heat must be supplied at 1000 degrees C if 1000 J of useful work is to be done by the engine?
the total average change in KE of gas molecules in the container is equal to the the sum of KE of an 8,0x10^-3 -Kg bullet with speed of 770 m/s. what is the Kelvin temp of the gas?
water's heat of fusion is 80 cal/g and is specific heat is 1.0 cal/g degree celcius. Some velmobile set have been designed to hold ice packs inside their cushions.
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