A student conducts an experiment using an unknown hydrate and obtains the following data:
Crucible 26.11g
Crucible + hydrate 31.11g
Crucible + anhydrate 28.55g
Further experimentation shows the anhydrate has the following composition: 20.19% magnesium, 26.64% sulfur and 53.17% oxygen.
A. Determine the mass of the hydrate, anhydrate and water.
B. Determine the emperical formula of the anhydrate.
C. Determine the formula of the hydrate.
Answers: 2
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Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o
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Use the periodic table to find the molar mass of each element. molar mass h = g/mol molar mass s = g/mol molar mass o = g/mol
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Consider the reaction: 2al(s) + fe2o3(s) → al2o3(s) + 2fe(s) the δhf for fe2o3(s) = -824.3 kj/mole. the δhf for al2o3(s) = -1675.7 kj/mole. finish the equation. δhrxn = [(1)( kj/mole) + (2)( kj/mole)] - [(1)( kj/mole) + (2) ( kj/mole)]
Answers: 1
A student conducts an experiment using an unknown hydrate and obtains the following data:
Crucible...
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