Chemistry Atoms First2e
2nd Edition
ISBN: 9781947172647
Author: OpenStax
Publisher: OpenStax College
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Textbook Question
Chapter 1, Problem 2E
Identify each of the following statements as being most similar to a hypothesis, a law, or a theory. Explain your reasoning.
(a) Falling barometric pressure precedes the onset of bad weather.
(b) All life on earth has evolved from a common, primitive organism through the process of natural selection.
(c) My truck’s gas mileage has dropped significantly, probably because it’s due for a tune-up.
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Identify each of the following statements as being most similar to a hypothesis, a law, or a theory. Explain your reasoning. (a) Falling barometric pressure precedes the onset of bad weather. (b) All life on earth has evolved from a common, primitive organism through the process of natural selection.
Which of the following statements is a scientific theory? (a) The energy in an atomic nucleus is found by E = mc². (b) There is the same number of molecules in equal -volumes of gases. (c) If the temperature of a gas doubles, the pressure doubles. (d) The region surrounding the nucleus has negative charges.
6.Express your answers to at least 5 significant figures. The mass of one mole of boron is 10.811 g.
(a) What is the mass in u of one boron atom? answer was 10.81
(b) What is the mass in kg of one boron atom? ___x10^_____
Chapter 1 Solutions
Chemistry Atoms First2e
Ch. 1 - Explain how you could experimentally determine...Ch. 1 - Identify each of the following statements as being...Ch. 1 - Identify each of the following statements as being...Ch. 1 - Identify each of the underlined items as a part of...Ch. 1 - Identify each of the underlined items as a part of...Ch. 1 - According to one theory, the pressure of a gas...Ch. 1 - The amount of heat required to melt 2 lbs of ice...Ch. 1 - Why do we use an objects mass, rather than its...Ch. 1 - What properties distinguish solids from liquids?...Ch. 1 - How does a heterogeneous mixture differ from a...
Ch. 1 - How does a homogeneous mixture differ from a pure...Ch. 1 - How does an element differ from a compound? How...Ch. 1 - How do molecules of elements and molecules of...Ch. 1 - How does an atom differ from a molecule? In what...Ch. 1 - Many of the items you purchase are mixtures of...Ch. 1 - Classify each of the following as an element, a...Ch. 1 - Classify each of the following as an element, a...Ch. 1 - A sulfur atom and a sulfur molecule are not...Ch. 1 - How are the molecules in oxygen gas, the molecules...Ch. 1 - Why are astronauts in space said to be weightless,...Ch. 1 - Prepare a list of the principal chemicals consumed...Ch. 1 - Matter is everywhere around us. Make a list by...Ch. 1 - When elemental iron corrodes it combines with...Ch. 1 - As stated in the text, convincing examples that...Ch. 1 - Yeast converts glucose to ethanol and carbon...Ch. 1 - Classify the six underlined properties in the...Ch. 1 - Classify each of the following changes as physical...Ch. 1 - Classify each of the following changes as physical...Ch. 1 - The volume of a sample of oxygen gas changed from...Ch. 1 - A 2.0-mer volume of hydrogen gas combined with 1.0...Ch. 1 - Explain the difference between extensive...Ch. 1 - Identify the following properties as either...Ch. 1 - The density (d) of a substance is an intensive...Ch. 1 - Is one liter about an ounce, a pint, a quart, or a...Ch. 1 - Is a meter about an inch, a foot, a yard, or a...Ch. 1 - Indicate the SI base units or derived units that...Ch. 1 - Indicate the SI base units or derived units that...Ch. 1 - Give the name and symbol of the prefixes used with...Ch. 1 - Give the name of the prefix and the quantity...Ch. 1 - A large piece of jewelry has a mass of 132.6 g. A...Ch. 1 - Visit this PhET density simulation...Ch. 1 - Visit this PhET density simulation...Ch. 1 - Visit this PhET density simulation...Ch. 1 - Express each of the following numbers in...Ch. 1 - Express each of the following numbers in...Ch. 1 - Indicate whether each of the following can be...Ch. 1 - Indicate whether each of the following can be...Ch. 1 - How many significant figures are contained in each...Ch. 1 - How many significant figures are contained in each...Ch. 1 - The following quantities were reported on the...Ch. 1 - Round off each of the following numbers to two...Ch. 1 - Round off each of the following numbers to two...Ch. 1 - Perform the following calculations and report each...Ch. 1 - Perform the following calculations and report each...Ch. 1 - Consider the results of the archery contest shown...Ch. 1 - Classify the following sets of measurements as...Ch. 1 - Write conversion factors (as ratios) for the...Ch. 1 - Write conversion factors (as ratios) for the...Ch. 1 - The label on a soft drink boule gives the volume...Ch. 1 - The label on a box of cereal gives the mass of...Ch. 1 - Soccer is played with a round ball having a...Ch. 1 - A woman’s basketball has a circumference between...Ch. 1 - How many milliliters of a soft drink are contained...Ch. 1 - A barrel of oil is exactly 42 gal. How many liters...Ch. 1 - The diameter of a red blood cell is about 3104 in....Ch. 1 - The distance between the centers of the two oxygen...Ch. 1 - Is a 197-lb weight lifter light enough to compete...Ch. 1 - A very good 197-Ib weight lifter lifted 192 kg in...Ch. 1 - Many medical laboratory tests are run using 5.0 L...Ch. 1 - If an aspirin tablet Contains 325 mg aspirin, how...Ch. 1 - Use scientific (exponential) notation to express...Ch. 1 - Complete the following conversions between SI...Ch. 1 - Gasoline is sold by the liter in many countries....Ch. 1 - Milk is sold by the liter in many Countries. What...Ch. 1 - A long ton is defined as exactly 2240 lb. What is...Ch. 1 - Make the conversion indicated in each of the...Ch. 1 - Make the conversion indicated in each of the...Ch. 1 - Many chemistry conferences have held a 50-Trillion...Ch. 1 - Many chemistry conferences have held a 50-Trillion...Ch. 1 - The gas tank of a certain luxury automobile holds...Ch. 1 - As an instructor is preparing for an experiment,...Ch. 1 - To prepare for a laboratory period, a student lab...Ch. 1 - A chemistry student is 159 cm tall and weighs 45.8...Ch. 1 - In a recent Grand Prix, the winner completed the...Ch. 1 - Solve these problems about lumber dimensions. To...Ch. 1 - The mercury content of a stream was believed to be...Ch. 1 - Calculate the density of aluminum if 27.6 cm3 has...Ch. 1 - Osmium is one of the densest elements known. What...Ch. 1 - Calculate these masses. What is the mass of 6.00...Ch. 1 - Calculate these masses. What is the mass of 4.00...Ch. 1 - Calculate these volumes. What is the volume of 25...Ch. 1 - Calculate these volumes. What is the volume of...Ch. 1 - Convert the boiling temperature of gold, 2966 C,...Ch. 1 - Convert the temperature of scalding water, 54 C,...Ch. 1 - Convert the temperature of the coldest area in a...Ch. 1 - Convert the temperature of dry ice, 77 C, into...Ch. 1 - Convert the boiling temperature of liquid ammonia....Ch. 1 - The label on a pressurized can of spray...Ch. 1 - The weather in Europe was unusually warm during...
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