The most commonly spoken language in the USA after English and Spanish is
A) Russian B) Korean C) Arabic D) French E) Chinese
E) Chinese
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Ozone depletion is caused by ____.
A. chlorofluorocarbons (CFCs) in the troposphere B. chlorofluorocarbons (CFCs) in the stratosphere C. global warming D. the greenhouse effect E. cold air in the polar regions
During what months is tornado activity most pronounced in the United States?
What will be an ideal response?
Which of the following compounds, all of which have the molecular formula C6H12, has cis and trans isomers?
A) 2-methyl-1-pentene B) 2-methyl-2-pentene C) 3-methyl-2-pentene D) They all have cis-trans isomers.
Which of the following will change the numerical value of the equilibrium constant of a particular reaction?
A) increasing the concentration of the products B) increasing the temperature C) both a and b D) neither a nor b