Groundwater supplies can be easily contaminated by surface mining of coal All BUT ONE may be how surface mining might adversely affect groundwater conditions,

A)
direct dumping of tailings and effluents into rivers

B)water used in the chemical extraction of metals, commonly contains
process chemicals

C)water which has trickled through solid mine wastes may contain dissolved
minerals, process chemicals, and/or metals

D)technologies used to control water flow prevents contamination

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.

How many grams of mgbr2 are needed to produce 75g or metal?

Acertain reaction has a activation energy of 54.0 kj/mol. as the temperature is increased from 22c to a higher temperature, the rate constant increases by a factor of 7.00. calculate the higher temperature. c (report only numerical answer)