Use standard enthalpies of formation to calculate ΔH∘rxn for the following reaction. Mg(OH)2(s)→MgO(s)+H2O(g) Express your answer using three significant figures.

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

Main expenses you plan on making payments on a new car too. you want to spend 15% of your monthly net pay on the car payment, insurance, registration, and taxes combined. what is your monthly car allowance? $149.46 $298.91 $448.37 $597.83

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?