For the chemical reaction c2h6--> c2h4+ h2+ 137kj, the chemical energy of the
a reactant is greater than the chemical energy of the products b. reactant and the chemical energy of the product are equal. c. reaction cannot be calculated. d. products is greater than the chemical energy of the reactant.

The answer is A    i hope this helps im just writing but the answer is A                                                                                                                                                           

The horse latitudes-high-pressure zones about 30 degrees north and 30 degrees south of the equator.-warm air traveling away from the equator cools and sinks-weather tends to be clear and drythe doldrums-low-pressure near equator-air rises and spreads out toward the poles-rising moist air produces clouds and heavy rainthe westerlies-blow from the west-move from the horse latitudes toward the poles.-bring storms across much of the united statesthe tradewinds-blow from the east-move from the horse latitudes toward the equator  -strong, steady winds

A. to determine if humans can explore mars safely