Primate cities are only found in the core
Indicate whether this statement is true or false.
FALSE
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How much energy, in kilojoules, is released or absorbed from the reaction of one mole of nitrogen, N2, with three moles of molecular hydrogen, H2, to form two moles of ammonia, NH3? H-N (bond energy: 389 kJ/mol)H-H (bond energy: 436 kJ/mol)N 
N (bond energy: 946 kJ/mol) N N + H-H + H-H ? NH3 + NH3
A. ?80 kJ/mol released B. +80 kJ/mol absorbed C. +899 kJ/mol absorbed D. ?993 kJ/mol released
There is active volcanism on bodies in the solar system besides Earth but only on other planets.
a. true b. false
This map shows contours of the water table, the location of four factories (labeled A, B, C, and D), and contaminated (x) and uncontaminated wells (-). Which factory contaminated the groundwater?
A. factory A B. factory B C. factory C D. factory D
Half-life is the time it takes for a given amount of a radioactive isotope to decay to half its original amount.
Answer the following statement true (T) or false (F)