The answer is D. Triple only
All matter is made up of substances called elements, which have specific chemical and physical properties and cannot be broken down into other substances through ordinary chemical reactions. Gold, for instance, is an element, and so is carbon. There are 118 elements, but only 92 occur naturally.
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<u>P</u><u>LEASE </u><u>MARK</u><u> ME</u><u> BRAINLIEST</u><u>.</u></h3>
Answer:
Explanation:
N₂O₄(g) ⇄ 2 NO₂
N₂O₄ reacted = .04 - .0055 = .0345 mole
NO₂ formed = 2 x .0345 = .069 moles
equilibrium constant = [ NO₂ ] ² / [ N₂O₄]
= .069² / .0055
= 0.865 .