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How many mL of a 93% w/w sulfuric acid having a specific gravity of 1.820 should be used in preparing 2,480 mL of 9% w/v acid?
A balloon filled with 39.1 mol of He gas has a volume of 875 L at 0.0 degrees Celsius and 1.00 atm. The temperature is increased to 38.0 degrees Celsius as the balloon expands to 998 L at constant pressure. Calculate delta E for the He sample. C H..
The rate constant for decay of 45Ca20 is 4.233x10-3/day. What is the half-life of 45Ca20? a) 81.86 days b) 163.7 days c) 327.4 days d) 409.3 days e) none of these
what is the freezing pint of a solution when 13.55 g of Mg(NO3)2 is dissolved in 156 mL of water when Tdegree
Calculate the mass of ethylene glycol (C2H6O2) that must be added to 1.00 kg of ethanol (C2H5OH) to reduce its vapor pressure by 13.6 torr at 35°C.
What will be the velocity of the escaping electrons under these conditions? What is the de Broglie wavelength of the escaping electrons?
Iodine-131 is a radioactive isotope. After 9.00 days, 46.0% of a sample of 131I remains. What is the half-life of 131I
What happens when the base solution was added to the acid solution but was not stirred while temperature measurements were made
what is the mass of the solid nh4cl formed when 64.0 g of nh3 are mixed with an equal mass of hcl? what is the volume
Prolonged exposure to mercury (Hg) vapor can cause neurological disorders and respiratory problems. For safe air quality, the concentration of mercury vapor must be under 0.050 mg/m3. Convert this number to g/L.
the antifreeze in a car was a 50 by weight solution of ethylene glycol c2h6o2 in water. calculate the boiling point and
Calculate Kc for the equilibrium: NO(g) + 1/2 O2(g) NO2(g) if Kp= 1.3 X 10^6 at 298 Kelvin
why do you suppose it is that you did an oxidation-reduction titrattgn to determine its concentration instead of an acid-base titration?
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