Textbook Question
Which of the following covalently bonded molecules are polar?
(a)
(b)
(c)
(d)
2
views
Ch. 2 Chemistry Comes Alive
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034
Not the one you use?Change textbookSelect a different textbook
Table of contents
- Ch. 1 The Human Body: An Orientation24
- Ch. 2 Chemistry Comes Alive25
- Ch. 3 Cells: The Living Units21
- Ch. 4 Tissue: The Living Fabric20
- Ch. 5 The Integumentary System11
- Ch. 6 Bones and Skeletal Tissues19
- Ch. 7 The Skeleton14
- Ch. 8 Joints7
- Ch. 9 Muscles and Muscle Tissue26
- Ch. 10 The Muscular System26
- Ch. 11 Fundamentals of the Nervous System and Nervous Tissue19
- Ch. 12 The Central Nervous System26
- Ch. 13 The Peripheral Nervous System and Reflex Activity32
- Ch. 14 The Autonomic Nervous System19
- Ch. 15 The Special Senses26
- Ch. 16 The Endocrine System23
- Ch. 17 Blood25
- Ch. 18 The Cardiovascular System: The Heart24
- Ch. 19 The Cardiovascular System: Blood Vessels27
- Ch. 20 The Lymphatic System and Lymphoid Organs and Tissues14
- Ch. 21 The Immune System: Innate and Adaptive Body Defenses27
- Ch. 22 The Respiratory System21
- Ch. 23 The Digestive System31
- Ch. 24 Nutrition, Metabolism, and Energy Balance26
- Ch. 25 The Urinary System26
- Ch. 26 Fluid, Electrolyte, and Acid-Base Balance24
- Ch. 27 The Reproductive System24
- Ch. 28 Pregnancy and Human Development25
- Ch. 29 Heredity11
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034Not the one you use?Change textbook
Chapter 2, Problem 17
How many moles of aspirin, C₉H₈O₄, are in a bottle containing 450 g by weight? (Note: The approximate atomic weights of its atoms are C = 12, H = 1, and O = 16.)
Verified step by step guidance1
Identify the molecular formula of aspirin, which is C\_9H\_8O\_4, and note the atomic weights: C = 12, H = 1, O = 16.
Calculate the molar mass of aspirin by multiplying the number of each type of atom by its atomic weight and summing the results: \(\text{Molar mass} = (9 \times 12) + (8 \times 1) + (4 \times 16)\).
Sum the values from the previous step to find the total molar mass of one mole of aspirin in grams per mole (g/mol).
Use the formula to find the number of moles: \(\text{moles} = \frac{\text{mass of sample (g)}}{\text{molar mass (g/mol)}}\).
Substitute the given mass of aspirin (450 g) and the calculated molar mass into the formula to determine the number of moles in the bottle.
Verified video answer for a similar problem:
This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
2mWas this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Molar Mass
Molar mass is the mass of one mole of a substance, calculated by summing the atomic masses of all atoms in its molecular formula. For aspirin (C₉H₈O₄), multiply the number of each atom by its atomic weight and add them to find the molar mass in grams per mole.
Recommended video:
06:50
Isotopes
Mole Concept
A mole represents 6.022 × 10²³ particles (atoms, molecules, etc.) of a substance. It links the microscopic scale of atoms to the macroscopic scale of grams, allowing conversion between mass and number of molecules using the molar mass.
Recommended video:
07:59Osmosis and Osmolarity
Mass to Moles Conversion
To find the number of moles from a given mass, divide the mass of the substance by its molar mass. This calculation converts the weight of aspirin in grams to the amount in moles, which is essential for stoichiometric and quantitative chemical analysis.
Recommended video:
02:52Second Law of Thermodynamics
Related Practice
Textbook Question
Identify each reaction as one of the following:
a. A synthesis reaction
b. A decomposition reaction
c. An exchange reaction
(1) 2Hg + O₂ → 2HgO
(2) HCl + NaOH → NaCl + H₂O
1
views
Textbook Question
A chemist, during the course of an analysis, runs across a chemical composed of carbon, hydrogen, and oxygen in the proportion 1:2:1 and having a six-sided molecular shape. It is probably:
a. A pentose
b. An amino acid
c. A fatty acid
d. A monosaccharide
e. A nucleic acid
Textbook Question
What are hydrogen bonds and how are they important in the body?
2
views
Textbook Question
Differentiate clearly between primary, secondary, and tertiary protein structure.
2
views
Textbook Question
Consider the following information about three atoms: 12/6 C 13/6 C 14/6 C
a. How are they similar to one another?
b. How do they differ from one another?
c. What are the members of such a group of atoms called?
d. Using the planetary model, draw the atomic configuration of 12/6 C, showing the relative position and numbers of its subatomic particles
1
views