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12. AU.S. penny has a mass of 2.500 g and is composed of 2.5% copper and 97.5% zinc (by mass). How many moles of copper are contained in $4.67 worth of pennies? Enter the correct numeric value with the appropriate number of significant figures. Express scientific notation like 4.29E-15 mol 13. What volume of a 0.600 M solution of NaNO3 contains exactly 0.0780 g of the compound? Enter the correct mumeric value with the appropriate number of significant figures. Express scientific notation like 4.29E-15 mL 14. White sand is made of silica (silicon dioxide, or SIO2), which has a density of 2.20 g/cm. How many silicon atoms are in a spherical grain of sand 0.610 mm in diameter? Enter the corect numeric value with the appropriate number of significant figuros. Exprens sciontific notation like 4.29E-15 Si atoms 15. If 8.47 mg of table salt (NaCI) is added to 3.30 L of pure water, what is the concentration of chloride ion (Cr) in the resulting solution, in parts per million (ppm) by mass? Enter the correct numeric value with the appropriate number of significant figures. Express scientific notation like 4.29E-15 ppm 16. Elemental analysis of an unknown hydrocarbon (C,Hy) shows that it contains 84.794426% carbon by mass. Determine the ratio of H atoms to C atoms (H/C) in the empirical formula of the compound. Enter the correct numeric value to 1.0% precision. Express scientific notation ike 4.29E-15 HIC

12. AU.S. penny has a mass of 2.500 g and is composed of 2.5% copper and 97.5% zinc (by mass). How many moles of copper are contained in $4.67 worth of pennies? Enter the correct numeric value with the appropriate number of significant figures. Express scientific notation like 4.29E-15 mol 13. What volume of a 0.600 M solution of NaNO3 contains exactly 0.0780 g of the compound? Enter the correct mumeric value with the appropriate number of significant figures. Express scientific notation like 4.29E-15 mL 14. White sand is made of silica (silicon dioxide, or SIO2), which has a density of 2.20 g/cm. How many silicon atoms are in a spherical grain of sand 0.610 mm in diameter? Enter the corect numeric value with the appropriate number of significant figuros. Exprens sciontific notation like 4.29E-15 Si atoms 15. If 8.47 mg of table salt (NaCI) is added to 3.30 L of pure water, what is the concentration of chloride ion (Cr) in the resulting solution, in parts per million (ppm) by mass? Enter the correct numeric value with the appropriate number of significant figures. Express scientific notation like 4.29E-15 ppm 16. Elemental analysis of an unknown hydrocarbon (C,Hy) shows that it contains 84.794426% carbon by mass. Determine the ratio of H atoms to C atoms (H/C) in the empirical formula of the compound. Enter the correct numeric value to 1.0% precision. Express scientific notation ike 4.29E-15 HIC

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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12. AU.S. penny has a mass of 2.500 g and is composed of 2.5% copper and 97.5% zinc (by mass). How many moles of copper are contained in $4.67 worth of pennies? Enter the correct numeric value with the appropriate number of significant figures. Express sciontific notation like 4.29E-15 mol 13. What volume of a 0.600 M solution of NANO3 contains exactly 0.0780 g of the compound? Enter the correct mumeric value with the appropriate number of significant figures. Express scientific notation like 4.29E-15 mL 14. White sand is made of silica (silicon dioxide, or SiO2), which has a density of 2.20 g/cm. How many silicon atoms are in a spherical grain of sand 0.610 mm in diameter? Enter the correct numeric value with the appropriate number of significant figures. Express scientific notation like 4,29E-15 Si atoms 15. If 8.47 mg of table salt (NaCI) is added to 3.30 L of pure water, what is the concentration of chloride ion (Cr) in the resulting solution, in parts per million (ppm) by mass? Enter the corect numeric value with the appropriate number of significant figures. Express sclentific notation like 4,29E-15 ppm 16. Elemental analysis of an unknown hydrocarbon (C,Hy) shows that it contains 84.794426% carbon by mass. Determine the ratio of H atoms to C atoms (H/C) in the empirical formula of the compound. Enter the correct numeric value to 1.0% precision. Express scientific notation ike 4.29E-15 H/C
Transcribed Image Text:12. AU.S. penny has a mass of 2.500 g and is composed of 2.5% copper and 97.5% zinc (by mass). How many moles of copper are contained in $4.67 worth of pennies? Enter the correct numeric value with the appropriate number of significant figures. Express sciontific notation like 4.29E-15 mol 13. What volume of a 0.600 M solution of NANO3 contains exactly 0.0780 g of the compound? Enter the correct mumeric value with the appropriate number of significant figures. Express scientific notation like 4.29E-15 mL 14. White sand is made of silica (silicon dioxide, or SiO2), which has a density of 2.20 g/cm. How many silicon atoms are in a spherical grain of sand 0.610 mm in diameter? Enter the correct numeric value with the appropriate number of significant figures. Express scientific notation like 4,29E-15 Si atoms 15. If 8.47 mg of table salt (NaCI) is added to 3.30 L of pure water, what is the concentration of chloride ion (Cr) in the resulting solution, in parts per million (ppm) by mass? Enter the corect numeric value with the appropriate number of significant figures. Express sclentific notation like 4,29E-15 ppm 16. Elemental analysis of an unknown hydrocarbon (C,Hy) shows that it contains 84.794426% carbon by mass. Determine the ratio of H atoms to C atoms (H/C) in the empirical formula of the compound. Enter the correct numeric value to 1.0% precision. Express scientific notation ike 4.29E-15 H/C
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