Concept explainers
Calculate the mass percent of S in each of the following:
a.
b.
c.
d.
e.
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Basic Chemistry
- Moles within Moles and Molar Mass Part 1: a How many hydrogen and oxygen atoms are present in 1 molecule of H2O? b How many moles of hydrogen and oxygen atoms are present in 1 mol H2O? c What are the masses of hydrogen and oxygen in 1.0 mol H2O? d What is the mass of 1.0 mol H2O? Part 2: Two hypothetical ionic compounds are discovered with the chemical formulas XCl2 and YCl2, where X and Y represent symbols of the imaginary elements. Chemical analysis of the two compounds reveals that 0.25 mol XCl2 has a mass of 100.0 g and 0.50 mol YCl2 has a mass of 125.0 g. a What are the molar masses of XCl2 and YCl2? b If you had 1.0-mol samples of XCl2 and YCl2, how would the number of chloride ions compare? c If you had 1.0-mol samples of XCl2 and YCl2, how would the masses of elements X and Y compare? d What is the mass of chloride ions present in 1.0 mol XCl2 and 1.0 mol YCl2? e What are the molar masses of elements X and Y? f How many moles of X ions and chloride ions would be present in a 200.0-g sample of XCl2? g How many grams of Y ions would be present in a 250.0-g sample of YCl2? h What would be the molar mass of the compound YBr3? Part 3: A minute sample of AlCl3 is analyzed for chlorine. The analysis reveals that there are 12 chloride ions present in the sample. How many aluminum ions must be present in the sample? a What is the total mass of AlCl3 in this sample? b How many moles of AlCl2 are in this sample?arrow_forwardcertain transition metal ion (Mn+) forms a compound with oxygen (MxOy) . The molar mass of the compound is 250.2 g/mol. If the charge on the transition metal ion is +3, what is the identity of the transition metal, M? l type='a'> Th Ti Hg Ru Agarrow_forwardCalculate the percent composition by mass of the following compounds that are important starting materials for synthetic polymers: a. C3H4O2 (acrylic acid, from which acrylic plastics are made) b. C4H6O2 (methyl acrylate, from which Plexiglas is made) c. C3H3N (acrylonitrile, from which Orion is made)arrow_forward
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- What mass of carbon (am-12.01 g/mole) is in 9.33 g of C₂H6O (mm-46.07 g/mole) O A.2.43 g 4 OB. 7.23 g O C. 4.86 g OD. 9.33 g OE. 4.47 garrow_forwardAcids 26. Name the following acids: a. H2SO3 b. HNO3 c. HCI 27. Write the formulas for the following acids: a. phosphoric acid b. hydroiodic acid d. hypobromous acid Hydrates 28. Name or write the formulas for the following hydrates: a. Na;CO3 · 10 H20 b. cobalt(11) chloride hexahydratearrow_forwardWhat is the empirical formula of a compound that is 66.6% C, 11.2% H, and 22.2% O by mass? Select one: O a. C,HO O b. CHO2 O c. C3H1602 O d. CgH110 O e. CH;Oarrow_forward
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