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Chapter 3: Q3.30P (page 132)
List three ways compositional data may be given in a problem that involves finding an empirical formula.
The Mass percentage , Mass of components or mass of compound and elements with one unknown.
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A 0.652-g sample of a pure strontium halide reacts with excess sulfuric acid, and the solid strontium sulfate formed is separated, dried, and found to weigh 0.755 g. What is the formula of the original halide?
Ferrocene, synthesized in 1951, was the first organic iron compound with bonds. An understanding of the structure of ferrocene gave rise to new ideas about chemical bonding and led to the preparation of many useful compounds. In the combustion analysis of ferrocene, which contains only and a 0.9437-g sample produced 2.233 g of and 0.457 g of What is the empirical formula of ferrocene?
Calculate each of the following:
a). Mass % of H in ammonium bicarbonate
b). Mass % of O in sodium dihydrogen phosphate heptahydrate
Seawater is approximately 4.0% by mass dissolved ions. About 85% of the mass of the dissolved ions is from NaCl.
(a) Find the mass % of NaCl in seawater.
(b) Find the mass % of Na+ions and of Cl-ions in seawater.
(c) Find the molarity of NaCl in seawater at 150C (d of seawater at 150C = 1.025 g/mL).
The rocket fuel hydrazine (N2H4) is made by the three-step Raschig process, which has the following overall equation:
What is the percent atom economy of this process?
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