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ch3wyc00ki3:

Which of these elements is rarely found in organic molecules? A. hydrogen B. oxygen C. barium D. carbon

Echofire:

Barium. It is a metal and metals are rarely in anything organic. Water (H2O) is common so hydrogen and oxygen are common. Carbon is well-known for being in living organisms.

ch3wyc00ki3:

@echofire wrote:
Barium. It is a metal and metals are rarely in anything organic. Water (H2O) is common so hydrogen and oxygen are common. Carbon is well-known for being in living organisms.
thank u

Echofire:

You are welcome.

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