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3 years ago

Which organ is a part of circulatory system? a. brain b. heart c. lungs d. stomach

Chemistry

2 answers:

Mumz [18]3 years ago

7 0

B is the answer 4 that :)

statuscvo [17]3 years ago

3 0

The brain is part of the neurological/nervous system, the lungs are part of the pulmonary system, and the stomach is the key component of the digestive system. This leaves the answe "B", the heart, as the answer because it is the pump in every mammalian body that drives blood flow leaving the heart through arteries and returning deoxygenated through the veins.

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4 years ago

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Jobisdone [24]

Answer:

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In O2 molecule, the bond is between 2 oxygen atoms which are non - metals. Thus, this is a covalent bond since it involves 2 non metals.

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3 years ago

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adelina 88 [10]

Answer:

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Step -3: Formation of trans-pent - 2-pent-ene by reduction.

Explanation:

Synthesis of trans-pent-2-yne from ethyne takes place is mainly a three step synthesis which involves formation of higher order terminal alkyne on reaction with sodium acetylides with haloalkane. Second step involves the further alkylation of terminal alkynes to higher order nonterminal alkynes and the third step involves the formation of trans-2-ene by dissolving reduction method.

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4 years ago

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