ethylene

"The prisoners were kept in a secure compound. "

"Gasoline is a hydrocarbon fuel used in many cars. "

"The stove burner released a gaseous smell, signaling the propane was low. "

"My grandmother grows the best tomatoes in her garden every summer. "

"The chemist studied the properties of the organic compound. "

"The simplest way to solve the math problem was to use the formula directly. "

"Magnesium is a divalent metal, readily forming compounds with other elements. "

"The water in the glass was completely colorless, like pure, clear liquid. "

"The formula for calculating the area of a rectangle is length times width. "

"The temperature in the room dropped nearly 20 degrees; it went from hot to cold."

"Apply pressure to the wound to stop the bleeding."

"The scientist studied the chemical composition of the soil sample. "