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Calculate the amount of heat evolved in the complete oxidation of 8.17 g of Al at 25oC and 1 bar pressure. The standard heat of formation of Al2O3 is -1676 kJ/mol. 4 Al(s) + 3 O2(g) 2 Al2O3(s).
A "little more" than 5 mL of a saturated solution of borax is transferred to the corresponding calibrated test tube and subsequently titrated with the standardized hydrochloric acid solution.
acetic acid is a weak monoprotic acid. it is the active ingredient in vinegar. if the initial concentration of acetic
The selenite ion is an oxoanion of selenium bearing a negative two charge and containing three oxygen atoms. Write the formula for the selenite ion.
Calculate q, the fraction of solute that would remain in the water under each of the following extraction conditions: Three extractions with 100 mL of ether.
a mixture of propane 75 mol and hydrogen are burned with 25 excess air. fractional conversions of 95 of the propane and
Calculate the pH of a buffer made with 0.50M phosphoric acid and 0.75M sodium dihydrogenphosphate. Ka = 7.5 x 10-3.
A fishing boat accidentally spills 15.0 barrels of diesel oil into the ocean. Each barrel contains 42 gallons. If the oil film on the ocean is 2.5 x 10^2 nm thick, how many square meters will the oil slick cover? Assume that the oil slick forms a ..
250 milligrams of butyric acid (CH3CH2CH2COOH) and 5 mL of ethanol (CH3CH2OH) were combined with conc sulfuric acid. What is the theoretical yield (in milligrams) of the ester product (CH3CH2CH2COOCH2CH3)?
Single double triple bonding, Explain the characteristics of a single, double, and triple bonds including why they form and how the electrons
Suppose that you wanted to be sure that a metal ion, any metal ion, would dissolve in water. What salt of the metal ion compound would you choose
identify the two important classes of catalysts. analyze the chemical reactions that take place when a biological
Consider the reaction HgS + O2 → SO2 + Hg. If 200.0 grams of HgS reacted with 150.0 grams of O2, what is the limiting reagent.
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