Complex sentence: Maleic acid is soluble in water, whereas fumaric acid is not; and the melting point of maleic acid (130-139 ° C) is also much lower than that of fumaric acid (287 ° C).
Split into simpler sentences: Maleic acid is soluble in water, whereas fumaric acid is not. The melting point of maleic acid (131-139 ° C) is also much lower than that of fumaric acid (287 ° C).