Mass Relationships for Compounds
Answer all assigned questions and problems, and show all work.
- How many atoms are there in 5.10 moles of sulfur (S)?
- How many moles of calcium (Ca) atoms are there in 77.4 g of Ca?
- What is the mass in grams of 1.00 1012 lead (Pb) atoms
- Describe how you would determine the isotopic abundance of an element from its mass spectrum.
- Cinnamic alcohol is used mainly in perfumery, particularly in soaps and cosmetics. Its molecular formula is C9H10O.
- Calculate the percent composition by mass of C, H, and O in cinnamic alcohol.(
- How many molecules of cinnamic alcohol are contained in a sample of mass 0.469 g
- How many carbon atoms are in 0.469 g of cinnamic alcohol?
- Allicin is the compound responsible for the characteristic smell of garlic. An analysis of the compound gives the following percent composition by mass: C: 44.4 percent; H: 6.21 percent; S: 39.5 percent; O: 9.86 percent. Calculate its empirical formula. What is its molecular formula given that its molar mass is about 486g?
- Tin(II) fluoride is often added to toothpaste as an ingredient to prevent tooth decay. What mass of fluoride in grams is in 258 g of toothpaste that has 15% tin(II) fluoride?
- What are the empirical formulas of the compounds with the following compositions? (a) 2.1 percent H, 65.3 percent O, 32.6 percent S(b) 20.2 percent Al, 79.8 percent Cl
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