题目内容

The graph above shows the different elements percentages found in the human body. What element is represented by the letter B?

A. carbon
B. nitrogen
C. hydrogen
D. oxygen

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Which of the following are properties of water? (check all that apply)

A. polar
B. nonpolar
C. forms hydrogen bonds with other water molecules
D. forms covalent bonds with other water molecules

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Lipids are considered _ because they do not interact with water. Carbohydrates and salts are considered _ because they do interact with water.

A. polar covalent, ionic
B. nonpolar, hydrophobic
C. hydrophobic, hydrophillic
D. polar, nonpolar

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Enantiomers are possible because carbon can form 4 bonds. Which of the following best describes enantiomers?

A. compounds with the same covalent partnerships that differ in spatial arrangements of atoms
B. compounds that are mirror images of each other
C. compounds that have the same molecular formula but differ in the covalent arrangement of atoms
D. compounds that have a different formulat but the same covalent arrangement

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The structure of water gives it several properties that make it a perfect solvent for life. The structure of water can be described as _ and the most common type of bonds water forms are called _.

A. polar, hydrogen bonds
B. polar, covalent bonds
C. nonpolar, ionic bonds
D. nonpolar, hydrogen bonds

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The graph above shows the different elements percentages found in the human body. What element is represented by the letter B?

A. carbon B. nitrogen C. hydrogen D. oxygen

Which of the following are properties of water? (check all that apply)

Lipids are considered _____ because they do not interact with water. Carbohydrates and salts are considered _____ because they do interact with water.

Enantiomers are possible because carbon can form 4 bonds. Which of the following best describes enantiomers?

The structure of water gives it several properties that make it a perfect solvent for life. The structure of water can be described as _____ and the most common type of bonds water forms are called _____.

A. carbon
B. nitrogen
C. hydrogen
D. oxygen

Lipids are considered _ because they do not interact with water. Carbohydrates and salts are considered _ because they do interact with water.

The structure of water gives it several properties that make it a perfect solvent for life. The structure of water can be described as _ and the most common type of bonds water forms are called _.