The term endothermic process describes a process or reaction in which the system absorbs energy from its surroundings; usually, but not always, in the form of heat.
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to find out how somethings work
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The mass of 4×10²¹ atoms Pt is ≈ 1 g Pt.
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i have no clue whats going on here but imma act like i do.....
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Answer:Option (3) less than the sum of its components' masses
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