At the current rates of use, the United States has enough coal to last the next ________
A) 60-90 years B) 40-50 years C) 15-20 years D) 100-250 years
D
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Ph3 + h2s ? ph4+ + hs-
What will be an ideal response?
Why do ethers have lower boiling points than that of an alcohol of the same molecular weight?
A) Ethers cannot hydrogen bond to other ethers. B) Ethers do not have hydrogens. C) Ethers are more flammable and vaporize more easily. D) Ethers have higher boiling points than alcohols. E) all of the above
What is the behavior of the Ekman spiral? What occurs when the friction depth is reached? What will be an ideal response?
At CO levels of 100 ppm or less in the bloodstream
A) carbon monoxide can contribute to acid rain. B) there is no noticeable health effect. C) humans might develop headaches and suffer from impaired vision and judgment. D) the human bloodstream is unaffected.