Introductory Chemistry: An Active Learning Approach
6th Edition
ISBN: 9781305079250
Author: Mark S. Cracolice, Ed Peters
Publisher: Cengage Learning
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Chapter 7, Problem 14E
Give the name and value of the number associated with the mole.
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How many moles are equal to 2.40 x 1023 formula units of sodium chloride? Round to two decimal places.
Be sure the answer has the correct number of significant digits.
1 mole of carbon atoms correspond to ---- number of carbon atoms.
Question 5 options:
12
6.02 x 1023
12 g
10.0 g
Chapter 7 Solutions
Introductory Chemistry: An Active Learning Approach
Ch. 7 - How many atoms of each element are in a formula...Ch. 7 - Prob. 2ECh. 7 - Why is it proper to speak of the molecular mass of...Ch. 7 - It may be said that because atomic, molecular, and...Ch. 7 - Which of the three terms atomic mass, molecular...Ch. 7 - In what units are atomic, molecular, and formula...Ch. 7 - Prob. 7ECh. 7 - Determine the formula or molecular mass of each...Ch. 7 - What is the molecular mass of each of the...Ch. 7 - Calculate the mass of each of the following...
Ch. 7 - What do quantities representing 1mole of iron...Ch. 7 - Explain what the term mole means. Why is it used...Ch. 7 - Is the mole a number? Explain.Ch. 7 - Give the name and value of the number associated...Ch. 7 - Determine how many atoms, molecules or formula...Ch. 7 - a How many molecules of boron trifluoride are...Ch. 7 - Calculate the number of moles in each of the...Ch. 7 - a How many atoms of hydrogen are present in...Ch. 7 - In what way are the molar mass of the atoms and...Ch. 7 - How does molar mass differ from molecular mass?Ch. 7 - Find the molar mass of all the following...Ch. 7 - Calculate the molar mass of each of the following:...Ch. 7 - Prob. 23ECh. 7 - Questions 23 to 26: Find the number of moles for...Ch. 7 - Questions 23 to 26: Find the number of moles for...Ch. 7 - Questions 23 to 26: Find the number of moles for...Ch. 7 - Questions 27 to 30: Calculate the mass of each...Ch. 7 - Questions 27 to 30: Calculate the mass of each...Ch. 7 - Questions 27 to 30: Calculate the mass of each...Ch. 7 - Questions 27 to 30: Calculate the mass of each...Ch. 7 - Prob. 31ECh. 7 - Prob. 32ECh. 7 - Prob. 33ECh. 7 - Prob. 34ECh. 7 - Questions 35 and 36:Calculate the mass of each of...Ch. 7 - Questions 35 and 36: Calculate the mass of each of...Ch. 7 - 37. On a certain day a financial website quoted...Ch. 7 - How many carbon atoms has a gentleman given his...Ch. 7 - A person who sweetens coffee with two teaspoons of...Ch. 7 - The mass of 1 gallon of gasoline is about 2.7kg....Ch. 7 - Prob. 41ECh. 7 - a How many molecules are in 3.61g F2? b How many...Ch. 7 - Questions 43 and 44: Calculate the percentage...Ch. 7 - Prob. 44ECh. 7 - Lithium fluoride is used as a flux when welding or...Ch. 7 - Ammonium bromide is a raw material in the...Ch. 7 - Potassium sulfate is found in some fertilizers as...Ch. 7 - Magnesium oxide is used in making bricks to line...Ch. 7 - Zinc cyanide cyanide ion, CN, is a compound used...Ch. 7 - An experiment requires that enough C5H12O be used...Ch. 7 - Molybdenum (Z=42) is an element used in making...Ch. 7 - How many grams of nitrogen monoxide must be...Ch. 7 - How many grams of the insecticide calcium chlorate...Ch. 7 - If a sample of carbon dioxide contains 16.4g of...Ch. 7 - Explain why C6H10 must be a molecular formula,...Ch. 7 - From the following list, identify each formula...Ch. 7 - A certain compound is 52.2 carbon, 13.0 hydrogen,...Ch. 7 - A compound is found to contain 15.94 boron and...Ch. 7 - A researcher exposes 11.89g of iron to a stream of...Ch. 7 - A compound is found to contain 39.12 carbon, 8.772...Ch. 7 - A compound is 17.2C, 1.44%H, and 81.4%F. Find its...Ch. 7 - A compound is found to contain 21.96 sulfur and...Ch. 7 - An antifreeze and coolant widely used in...Ch. 7 - A compound is found to contain 31.42 sulfur, 31.35...Ch. 7 - A compound is 73.1 chlorine, 24.8 carbon, and the...Ch. 7 - A compound is found to contain 25.24 sulfur and...Ch. 7 - Prob. 67ECh. 7 - Prob. 68ECh. 7 - Prob. 69ECh. 7 - Prob. 70ECh. 7 - Prob. 71ECh. 7 - The quantitative significance of take a deep...Ch. 7 - Prob. 73ECh. 7 - Prob. 74ECh. 7 - CoaSbOcXH2O is the general formula of a certain...Ch. 7 - Prob. 1CLECh. 7 - Prob. 2CLECh. 7 - Prob. 1PECh. 7 - Prob. 2PECh. 7 - Prob. 3PECh. 7 - Prob. 4PECh. 7 - Prob. 5PECh. 7 - Determine the mass in grams of 3.21024 molecules...Ch. 7 - Prob. 7PECh. 7 - Prob. 8PECh. 7 - In Practice Exercise 7-7, you determined that...Ch. 7 - Prob. 10PECh. 7 - Prob. 11PECh. 7 - Prob. 12PECh. 7 - Prob. 13PECh. 7 - Nicotine is 74.1 carbon, 8.64 hydrogen, and 17.3...Ch. 7 - A compound has a molar mass of 292g/mol. Its...
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- Explain what the term mole means. Why is it used in chemistry?arrow_forwardCan the subscripts in a chemical formula be fractions? Explain.arrow_forwardThe chemical formula for lithium hydride is LiH. A chemist measured the amount of lithium hydride produced during an experiment. She finds that 585. g of lithium hydride is produced. Calculate the number of moles of lithium hydride produced. Round your answer to 3 significant digits. molarrow_forward
- How many formula units are in 2.57 g of Cu2O? Enter decimal followed by power of 10.arrow_forward49.arrow_forwardFor the molecular compound phosphorus trichloride, what would you multiply "moles of PCI3" by to get the units "molecules of PCI3" ? moles PCI3 Use the References to access important values if needed for this question. Drag and drop your selection from the following list to complete the answer: 6.02 x 1023 moles PC13 6.02 x 1023 molecules PC13 1 molecule PC13 1 mole PC13 Submit Answer -= molecules PCI 3 An error has been detected in your answer. Check for typos. miscalculations etc. before submitting your answer. ● Retry Entire Group 9 more group attempts remaining M Previous Next 7:09arrow_forward
- Can you please fill in the blanksarrow_forwardHow many grams of MgBr2 are in 5.61 x 1022 molecules of magnesium bromide (MgBr2)? Mg = 24.01 g/mol Br = 79.90 g/mol Additional Information: If needed, use the periodic chart values from the printable Periodic chart provided with this course. If needed use 6.022 x 1023 for Avogadro's number. Format your answer: With three significant figures Include the correct unit. Enter your answer in decimal form with 3 sig figs. Use the proper abbreviation for the units.arrow_forwardAssume that the ratio of moles of Cl to moles of Cu are 1.84. If we can represent the formula by CuClx, what is the value for x? Round your answer to the nearest whole number. Do NOT include units. So, if you think the formula is CuCl6, you enter the number 6.arrow_forward
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