Igualar las siguientes ecuaciones químicas por el método de Tanteo y oxidorreducción. 1._Ácido nítrico + ácido sulfhídrico se obtiene ácido sulfúrico + monóxido de nitrógeno y agua.
2._Amoniaco + oxígeno se obtiene monóxido de nitrógeno y agua

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

i just learnt this recently but i need to look through my notes again

b is the correct answer

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