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Can someone give me natural existing solutions? Like not manmade solutions? Given: The coordinates of rectangle DEFG are D(0, b), E(a, b), F(a, 0), and G(0, 0). Prove: The diagonals of a rectangle are congruent.As...? How many grams of NH3 can be produced from 2.15 mol of N2 and excess H2? What is the heat of formation of hexane, C6H14 ? Uranium 238 is a naturally occurring isotope. If it goes into β+ decay, what will be the product in isotope notation?