Calculate the standared enthalpy of formation of solid Mg(OH)2 given the following data: 2Mg(s) + O29(g) →2MgO(s) ∆H = -1203.6kJ
Mg(OH)2(s) →MgO(s) + H2O(l) ∆H= +37.1kJ
2H2(g) +O2(g) →2H2O(l) ∆H = -571.7kJ

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a. they are both space stations

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pls mark as brainliest.

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.