Concept explainers
How many atoms of nitrogen are present in 5.00 g ofeach of the following?
a. glycine,
b. magnesium nitride d. dinitrogen tetroxide
(a)
Interpretation: The number of atoms of nitrogen in
Concept introduction: In a particular mass corresponding to the substance, the entities specifically as its atoms or as its molecules can be evaluated via mole concept.These respective entities are computed using a specific constant designated as Avogadro’s number and is widely utilized in stoichiometric calculations. Numerical value relative to this constant is
Answer to Problem 36E
The number of atoms of nitrogen in
Explanation of Solution
The molar mass value of glycine
The moles of glycine
Substitute the values in above formula.
The glycine molecule
The number of nitrogen atoms can be calculated as follows.
The value of Avogadro’s number is
Substitute the values in above formula.
Therefore, the number of nitrogen atoms in glycine are
(b)
Interpretation: The number of atoms of nitrogen in
Concept introduction:In a particular mass corresponding to the substance, the entities specifically as its atoms or as its molecules can be evaluated via mole concept. These respective entities are computed using a specific constant designated as Avogadro’s number and is widely utilized in stoichiometric calculations. Numerical value relative to this constant is
Answer to Problem 36E
The number of atoms of nitrogen in
Explanation of Solution
The chemical formula corresponding to magnesium nitride is
The molar mass value of
The moles of
Substitute the values in above formula.
The
The number of nitrogen atoms can be calculated as follows.
The value of Avogadro’s number is
Substitute the values in above formula.
Therefore, the number of nitrogen atoms in
(c)
Interpretation: The number of atoms of nitrogen in
Concept introduction:In a particular mass corresponding to the substance, the entities specifically as its atoms or as its molecules can be evaluated via mole concept. These respective entities are computed using a specific constant designated as Avogadro’s number and is widely utilized in stoichiometric calculations. Numerical value relative to this constant is
Answer to Problem 36E
The number of atoms of nitrogen in
Explanation of Solution
The chemical formula corresponding to calcium nitrate is
The molar mass value of
The moles of
Substitute the values in above formula.
The
The number of nitrogen atoms can be calculated as follows.
The value of Avogadro’s number is
Substitute the values in above formula.
Therefore, the number of nitrogen atoms in
(d)
Interpretation: The number of atoms of nitrogen in
Concept introduction:In a particular mass corresponding to the substance, the entities specifically as its atoms or as its molecules can be evaluated via mole concept. These respective entities are computed using a specific constant designated as Avogadro’s number and is widely utilized in stoichiometric calculations. Numerical value relative to this constant is
Answer to Problem 36E
The number of atoms of nitrogen in
Explanation of Solution
The chemical formula corresponding to dinitrogen tetroxide is
The molar mass value of
The moles of
Substitute the values in above formula.
The
The number of nitrogen atoms can be calculated as follows.
The value of Avogadro’s number is
Substitute the values in above formula.
Therefore, the number of nitrogen atoms in
Want to see more full solutions like this?
Chapter 3 Solutions
CHEM.PRINC.W/OWL2+REBATE+2 SUPPL.>IP<
- An Alka-Seltzer tablet contains 324 mg of aspirin (C.9H8O4,), 1904 mg of NaHCO3, and 1000. mg of citric add (H3C6H5O7). (The last two compounds react with each other to provide the "fizz," bubbles of CO2, when the tablet is put into water.) (a) Calculate the amount (moles) of each substance in the tablet. (b) If you take one tablet, how many molecules of aspirin are you consuming?arrow_forwardUse the average atomic masses given inside the front cover ofthis book to calculate the mass in grams of each of the following samples. l type='a'> 0.00552 mole of calcium 6.25 mmol of boron (1mmol=11000mole) i>135 moles of aluminum 1.34107 moles of barium 2.79 moles of phosphorus 0.0000997 mole of arsenicarrow_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
- You have a 20.0-g sample of silver metal. You are given 10.0 g of another metal and told that tills sample contains twice the number of atoms as the sample of silver metal. Is this possible?arrow_forwardUse the average atomic masses given inside the front cover of this hook to calculate the number of moles of the element present in each of the following samples. l type='a'> 49.2 g of sulfur 7.44104 kg of lead 3.27 mg of chlorine 4.01 g of lithium l00.Ogofcopper 82.6 mg of strontiumarrow_forwardCalculate the number of moles of sulfur atoms present in each of the following samples. l type='a'> 2.01 g of sodium sulfate 2.01 g of sodium sulfite 2.01 g of sodium sulfide 2.01 g of sodium thiosulfate, Na2S2O3arrow_forward
- A compound was analyzed and found to contain the following percentages of elements by mass: carbon, 79.89%; hydrogen, 20.11%. l type='a'> Determine the empirical formula of the compound. i>Which of the following could be a molar mass of the compound? 13.018 g/mol 16.042g/mol 28.052 g/mol 30.068 g/mol 104.23 g/rnolarrow_forwardWhat mass of compound is present in 5.00 moles of each of the compounds in Exercise 52?arrow_forwardefine the amu. What is one amu equivalent to in grains?arrow_forward
- Freon- 12 (CCI2F2) is used as a refrigerant in air conditioners and as a propellant in aerosol cans. Calculate the number of molecules of Freon-12 in 5.56 mg of Freon-12. What is the mass of chlorine in 5.56 mg of Freon-12?arrow_forwarderhaps the most important concept in introductory chemistry concerns what a mole of a substance represents. The mole concept will come up again and again in later chapters in this book. What does one mole of a substance represent on a microscopic, atomic basis? What does one mole of a substance represent on a macroscopic, mass basis? Why have chemists defined the mole in this manner?arrow_forwardCalculate the mass in grams of each of the following samples. l type="a"> 0.994 mole of benzene, C6H6 i>4.21 moles of calcium hydride 1.79104 moles of hydrogen peroxide, H2O2 i>1.22 rnmol of glucose, C6H12O6(1mmol=11000mole) i>10.6 moles of tin 0.000301 moIe of strontium fluoridearrow_forward
- Introductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage LearningWorld of Chemistry, 3rd editionChemistryISBN:9781133109655Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCostePublisher:Brooks / Cole / Cengage LearningChemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage Learning
- Chemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage LearningChemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage Learning