This isotope of oxygen is the least common: ________
Fill in the blank(s) with the appropriate word(s).
Answer: oxygen-18
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We tend to associate the term "potholes" with problems in roadways that are not paved properly. However, an important type of inland wetland is the ____________pothole
Fill in the blanks with correct word
An amine can often form R-NH3+ (where R- can stand for anything) by reacting with water. What is happening?
A. The amine is accepting a proton from the water molecule, forming OH-. B. Amines are basic. C. Amines can form H3O+ in water by donating a proton from the polar portion of the molecule. D. Amines are acidic. E. none of the above
What is not true of a mixture?
a. A mixture is different substances closely intermingled. b. A mixture is able to maintain separate properties. c. A mixture is able to disperse homogenously. d. A mixture may have varying concentrations and properties throughout.
The U.S. Senate has so far opposed emissions reductions on the grounds that ________
A) it might hurt the economy B) no other nations have pledged reductions C) the United States does not emit significant amounts of greenhouse gases D) the United States already has reduced its emissions by 68% as agreed in the Copenhagen treaty E) President Obama rejected the scientific basis of global climate change