Which of the following is the study of the rates of chemical reactions?
A) kinetics
B) stoichiometry
C) thermodynamics
D) none of these
A
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Which type of radiation is being emitted in the following incomplete nuclear equation: Po ? Pb +?
A) alpha B) beta C) gamma D) A and B E) none of the above
The Chicxulub impact crater was the first evidence to suggest that a meteorite impact caused the Cretaceous-Tertiary mass extinction
Indicate whether the statement is true or false
In energy conversions such as burning coal to produce heat, ________
A) entropy decreases because heat is used to ignite the coal B) entropy increases because of heat released in the conversion C) entropy decreases because of heat released in the conversion D) entropy is unchanged because heat is used to ignite the coal
Which of the following is TRUE about top predators?
A) They are likely to be producers. B) Their removal increases biodiversity. C) They are likely to be herbivores. D) They include bacteria and fungi. E) They are often keystone species.