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A compound consists of only C and H. When 0.115 g of the compound reacts with oxygen, 0.379 g of CO2 and 0.1035 g of H2O are produced. Explain what is the empirical formula of the compound?
Write two equations to show the reaction of 4-methylcyclohexene with (a) Br2/CH2Cl2 (b) KmnO4.
a gas mixture of a amp b containing 1.5 mole a and 98.5 mole b is to be contacted by a pure liquid in a packed
Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The half-life of iodine-131 is 8.04 days. If you begin with 49.8 mg of this isotope, what mass remains after 13.4 days have passed
The pressure of 4.57 L of an ideal gas in a flexible continer is decreased to one-third of its original pressure, and its kelvin temperature is decreased by one half
A buffer is initially 0.180M in 4-nitrophenol (HC6H4NO3) and 0.200M in potassium 4-nitrophenolate (KC6H4NO3). The Ka of 4-nitrophenol is 3.8*10^-4 and the buffer has a pOH = 3.47. If 0.20g on NaOH were added to 100ml of this buffer what would the ..
Chromic acid is a diprotic acid H2CrO4 with Ka1 = 0.18 and Ka2 = 3.2 x 10-7. A solution of potassium chromate is prepared at pH 5.43. Calculate the fraction of the total chromate in this solution that is present as the chromate ion CrO42-.
Petroleum consumption in the US in 1990 supplied about 34.6E15 kJ of energy. Of this quantity, about 14.3E15 kJ was supplied by foreign sources.
Write a balanced combustion reaction for natural gas composed of 90 mol% methane and 10 mol% ethane. [Fractional moles are convenient for the subsequents calculations. Your reaction should have .90 mol methane and .10 mol ethane on the left side. ..
What is the composition in mole fractions of a solution that has a vapor pressure of 39 at 20 ? Express your answer using two significant figures.
a sample of calcium hydroxide is placed into a jar containing water. the mass of the calcium hydroxide same is 1.34g.
In this experiment, 25.00mL of 0.1500 M of EDTA was added to 15.00mL of the unknown Ca2+ solution as well as the EDTA that is in excess was titrated using 0.05000 M of Mg2+. It took 5.40mL of Mg2+ solution to reach the equivalence point. Compute ..
A particular brand of gasoline has a density of 0.737 at 25C . How many grams of this gasoline would fill a 13.3 tank?
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