Which of the following is an example of hydrogen bonding?
A) The bond between O of one water molecule and H of a separate water molecule
B) The bond between O of one water molecule and O of a separate water molecule
C) The bond between H of one water molecule and H of a separate water molecule
D) The bond between the H of a water molecule and H of a hydrogen molecule
E) The bond between O and H in a single molecule of water
A
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Erectile dysfunction
a. Affects about 30 million men in the U.S. b. can be a complication of smoking. c. can be a complication of circulatory problems. d. usually affects men as they age. e. includes all of these.
At what temperature is water most dense?
a. 0 degrees Celsius b. 1 degree Celsius c. 4 degrees Celsius d. 10 degrees Celsius e. 100 degrees Celsius
Nitrogen has a higher electronegativity than hydrogen. As a result you would expect that ammonia (NH3) molecules can form ________ with each other.
A. hydrogen bonds B. ionic bonds C. hydrophilic bonds D. covalent bonds E. cohesive bonds
Which one of the following statements is contrary to basic scientific thought?
A. There are specific causes for events observed in the natural world, and the causes can be identified. B. There are general rules or patterns that can be used to describe what happens in nature. C. What one person perceives will often be difficult for others to perceive. D. The same fundamental rules of nature apply regardless of where and when they occur.