Math Problem Statement
Determine how many of each atom are in the follow chemical compounds. a. Sulfur dioxide b. Xenon tetrafluoride c. Nitrogen dioxide d. Copper(II) hydrogen carbonate e. Sodium hypochlorite f. Ammonium nitrite g. Sulfurous acid h. Calcium hydride i. Magnesium phosphate j. Nickel(II) acetate k. Colbalt(II) hydroxide l. Ammonium carbonate 2. Determine the molecular weight, in atomic mass units, for each of the compounds in question #1. 3. How many atoms are in each of the following? a. 7.75 moles of carbon tetrahydride, CH4 b. 0.0888 moles of carbon monoxide c. 75.00g of calcium nitrate d. The number of hydrogen atoms in 15.00g of ammonium hydrogen phosphate e. The number of carbon atoms in 15.00g calcium acetate f. The number of oxygen atoms in 15.00g of dinitrogen tetroxide 4. Determine the mass of each of the following. a. 57.1mol of acetic acid b. 4.30x1021 molecules of nickel(II) chloride c. 8.01x10A atoms of iron d. 1.568moles of water e. 15.6moles of silver nitrate f. The mass of oxygen in 5.67 moles of barium oxalate 5. Determine the mass of one mole of the following: a. C2 H6 b. Fe 2 O3 c. Ca 3 P 2 d. Ca(C2 H3 O2 )2 e. H2 O2 f. CH3 COOH 6. Determine the number of moles in 25.00g of each of the compounds in question #5. 7. A person who sweetens their tea with two teaspoons of sugar, C12 H22 O11, uses about 0.65g. How many sugar molecules is this? 8. What mass of gold contains the same number of atoms as 50.0g of aluminum? 9. Determine the percent composition of each of the following compounds. a. Aluminum sulfate b. Sodium phosphate c. Calcium nitrate d. Barium acetate e. Iron(III) oxide f. Copper(II) permanganate
Solution
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Math Problem Analysis
Mathematical Concepts
Stoichiometry
Mole Concept
Atomic and Molecular Mass
Percent Composition
Formulas
Molecular weight = Sum of atomic masses of each element in the compound
Number of atoms = moles × Avogadro's number
Mass = moles × molar mass
Percent composition = (mass of element in 1 mole of compound / molar mass of compound) × 100
Theorems
Avogadro's Law
Suitable Grade Level
Grades 10-12
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