The hydration of crotonate to form 3-hydroxybutyrate occurs by the addition of -OH to the Si face of C3, followed by protonation at the Si face of C2. Draw the product of the reaction, showing the stereochemistry.

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

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