Chemistry: Structure and Properties
1st Edition
ISBN: 9780321834683
Author: Nivaldo J. Tro
Publisher: PEARSON
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Chapter 1, Problem 15E
State and explain the law of definite proportions.
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State and explain the law of definite proportions.
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Chapter 1 Solutions
Chemistry: Structure and Properties
Ch. 1 - Which statement is true about matter? a) Matter is...Ch. 1 - A chemist mixes sodium with water and witnesses a...Ch. 1 - Two samples of a compound containing elements A...Ch. 1 - A compound containing only carbon and hydrogen has...Ch. 1 - Which concept was demostrated by Rutherford’s gold...Ch. 1 - A student re-creates Millikan’s oil drop...Ch. 1 - Prob. 7SAQCh. 1 - An isotope of an element contains 82 protons and...Ch. 1 - How many electrons are in the Cr3+ ion? 24...Ch. 1 - A naturally occurring sample of an element...
Ch. 1 - Copper has an atomic mass of 63.55 amu and two...Ch. 1 - Which sample contains the greatest number of...Ch. 1 - Explain this statement in your own words and give...Ch. 1 - Explain the main goal of chemistry.Ch. 1 - What are two different ways to classify matter?Ch. 1 - How do solids, liquids, and gases differ?Ch. 1 - Explain the difference between a pure substance...Ch. 1 - Explain the difference between an element and a...Ch. 1 - Explain the difference between a homogeneous and a...Ch. 1 - Describe the scientific approach to knowledge. How...Ch. 1 - Prob. 9ECh. 1 - What observations did Antoine Lavoisier make? What...Ch. 1 - What theory did John Dalton formulate?Ch. 1 - What is wrong with the expression, “That is just a...Ch. 1 - Summarize the history of the atomic idea. How was...Ch. 1 - Prob. 14ECh. 1 - State and explain the law of definite proportions.Ch. 1 - State and explain the law of multiple proportions....Ch. 1 - What are the main ideas in Dalton’s atomic theory?...Ch. 1 - How and by whom was the electron discovered? What...Ch. 1 - Explain Millikan’s oil drop experiment and how it...Ch. 1 - Prob. 20ECh. 1 - Describe Rutherford’s gold foil experiment. How...Ch. 1 - Describe Rutherford’s nuclear model of the atom....Ch. 1 - If matter is mostly empty space, as suggested by...Ch. 1 - List the three subatomic particles that compose...Ch. 1 - What defines an element?Ch. 1 - Explain the difference between Z (the atomic...Ch. 1 - Where do elements get their names?Ch. 1 - What are isotopes? What is percent natural...Ch. 1 - Describe the two different notations used to...Ch. 1 - Prob. 30ECh. 1 - Prob. 31ECh. 1 - Explain how a mass spectrometer works. What kind...Ch. 1 - Each shape represents a type of particle (such as...Ch. 1 - Using triangles to represent one type of atom and...Ch. 1 - Classify each substance as a pure substance or a...Ch. 1 - Classify each substance as a pure substance or a...Ch. 1 - Prob. 37ECh. 1 - Complete the table. Substance Pure or mixture Type...Ch. 1 - Determine whether each molecular diagram...Ch. 1 - Determine whether each molecular diagram...Ch. 1 - Classify each statement as an observation, a law,...Ch. 1 - Classify each statement as an observation, a law,...Ch. 1 - A chemist decomposes several samples of carbon...Ch. 1 - When astronomers observe distant galaxies, they...Ch. 1 - Prob. 45ECh. 1 - An automobile gasoline tank holds 21 kg of...Ch. 1 - Two samples of carbon tetrachloride are decomposed...Ch. 1 - Two samples of sodium chloride are decomposed into...Ch. 1 - The mass ratio of sodium to fluorine in sodium...Ch. 1 - Upon decomposition, one sample of magnesium...Ch. 1 - Two different compounds containing osmium and...Ch. 1 - Palladium forms three different compounds with...Ch. 1 - Prob. 53ECh. 1 - Sulfur and fluorine form several different...Ch. 1 - Which statements are consistent with Dalton’s...Ch. 1 - Which statements are inconsistent with Dalton’s...Ch. 1 - Which statements are consistent with Rutherford’s...Ch. 1 - Which statements are inconsistent with...Ch. 1 - A chemist in an imaginary universe, where...Ch. 1 - Imagine a unit of charge called the zorg. A...Ch. 1 - Which statements about subatomic particles are...Ch. 1 - Which statements about subatomic particles are...Ch. 1 - Write isotopic symbols in the form XA (e g., C-13)...Ch. 1 - Write isotopic symbols in the form ZAX for each...Ch. 1 - Determine the number of protons and the number of...Ch. 1 - Determine the number of protons and the number of...Ch. 1 - The amount of carbon-14 in ancient artifacts and...Ch. 1 - Uranium-235 is used in nuclear fission. Determine...Ch. 1 - Determine the number of protons and the number of...Ch. 1 - Determine the number of protons and the number of...Ch. 1 - Gallium has two naturally occurring isotopes with...Ch. 1 - Magnesium has three naturally occurring isotopes...Ch. 1 - The atomic mass of fluorine is 18.998 amu, and its...Ch. 1 - The atomic mass of copper is 63.546 amu. Do any...Ch. 1 - An element has two naturally occurring isotopes....Ch. 1 - An element has four naturally occuring isotopes...Ch. 1 - Bromine has two naturally occurring isotopes...Ch. 1 - Silicon has three naturally occurring isotopes...Ch. 1 - Use the mass spectrum of europium shown here to...Ch. 1 - Use the mass spectrum of rubidium shown here to...Ch. 1 - A 7.83-g sample of HCN contains 0.290 g of H and...Ch. 1 - The ratio of sulfur to oxygen by mass in SO2 is...Ch. 1 - Use the mass spectrum of lead shown here to...Ch. 1 - Use the mass spectrum of mercury shown here to...Ch. 1 - Nuclei with the same number of neutrons but...Ch. 1 - Fill in the blanks to complete the table. Symbol z...Ch. 1 - Silver is composed of two naturally occurring...Ch. 1 - To the right is a representation of 50 atoms of a...Ch. 1 - The ratio of oxygen to nitrogen by mass in NO2 is...Ch. 1 - Naturally occurring cobalt consists of only one...Ch. 1 - A 7.36-g sample of copper is contaminated with an...Ch. 1 - The ratio of the mass of O to the mass of N in...Ch. 1 - Naturally occurring magnesium has an atomic mass...Ch. 1 - A volatile liquid (one that readily evaporates) is...Ch. 1 - The diagram to the right represents solid carbon...Ch. 1 - Use triangles to represent atoms of element A and...Ch. 1 - Identify each statement as being most like an...
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- Constant Composition of Compounds Two samples of sugar are decomposed into their constituent elements. One sample of sugar produces 18.0 g carbon, 3.0 g hydrogen, and 24.0 g oxygen; the other sample produces 24.0 g carbon, 4.0 g hydrogen, and 32.0 g oxygen. Find the ratio of carbon to hydrogen and the ratio of oxygen to hydrogen for each of the samples, and show they are consistent with the law of constant composition.arrow_forwardName the following compounds: CsCl BaO K2S BeCl2 HBr AlF3 AlF3arrow_forwardThree compounds containing only carbon and hydrogen are analyzed. The results for the analysis of the first two compounds are given below: Which, if any, of the following results for the mass of hydrogen in compound C follows the law of multiple proportions? (a) 5.84 g(b) 3.47 g (c) 2.72 garrow_forward
- 2.71 Use the web to determine the amount of low-density polyethylene and high-density polyethylene produced annually in the United States. Which uses predominate in the applications of these two materials?arrow_forwardIn a neutron star, gravity causes the electrons to combine with protons to form neutrons. A typical neutron star has a mass half that of the sun, compressed into a sphere of radius 20 km. If such a neutron star contains 6.01056 neutrons, calculate its density in grams per cubic centimeter. Compare this with the density inside a 232Th nucleus, in which 142 neutrons and 90 protons occupy a sphere of radius 9.11013cm . Take the mass of a neutron to be 1.6751024g and that of a proton to be 1.6731024g .arrow_forwardEthane and ethylene are two gases containing only hydrogen and carbon atoms. In a certain sample of ethane, 4.53 g of hydrogen is combined with 18.0 g of carbon. In a sample of ethylene, 7.25 g of hydrogen is combined with 43.20 g of carbon. (a) Show how the data illustrate the law of multiple proportions. (b) Suggest reasonable formulas for the two compounds.arrow_forward
- Several samples of methane gas, the primary component of natural gas, are decomposed into carbon and hydrogen. The masses of the carbon and hydrogen are then weighed, and the results are tabulated as shown here. Which of these does not follow the law of constant composition? a. 4.0 grams hydrogen and 12.0 grams carbon b. 1.5 grams hydrogen and 4.5 grams carbon c. 7.0 grams hydrogen and 17.0 grams carbon d. 10 grams hydrogen and 30 grams carbonarrow_forwardTwo elements, R and Q, combine to form two binary compounds. In the first compound, 14.0 g of R combines with 3.00 g of Q. In the second compound, 7.00 g of R combines with 4.50 g of Q. Show that these data are in accord with the law of multiple proportions. If the formula of the second compound is RQ, what is the formula of the first compound?arrow_forwardDraw a formula for each of the following molecules using circular symbols of your choice to represent atoms: a. A diatomic molecule of an element b. A diatomic molecule of a compound c. A triatomic molecule of an element d. A molecule of a compound containing one atom of one element and four atoms of another elementarrow_forward
- In the following drawing, the green spheres represent atoms of a certain element. The purple spheres represent atoms of another element. If the spheres of different elements touch, they are part of a single unit of a compound. The following chemical change represented by these spheres may violate one of the ideas of Dalton’s atomic theory. Which one?arrow_forwardCalculate the number of atoms in the universe. The following steps will guide you through this calculation: a. Planets constitute less than 1% of the total mass of the universe and can, therefore, be neglected. Stars make up most of the visible mass of the universe, so we need to determine how many atoms are in a star. Stars are primarily composed of hydrogen atoms and our Sun is an average-sized star. Calculate the number of hydrogen atoms in our Sun given that the radius of the Sun is 7108 m and its density is 1.4g/cm3. The volume of a sphere is given by V=(43)r3 (Hint: Use the volume and the density to get the mass of the Sun.) b. The average galaxy (like our own Milky Way galaxy) contains 11011 stars, and the universe contains 1109 galaxies. Calculate the number of atoms in an average galaxy and finally the number of atoms in the entire universe. c. You can hold 11023 atoms in your hand (five copper pennies constitute 1.41023 copper atoms.) How does this number compare with the number of atoms in the universe?arrow_forwardWhat is acompound? What are compounds composed of? What is true about the composition of a compound, no matter where we happen to find the compound?arrow_forward
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