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How much energy is released when 2.8 kg of diethyl ether freezes?

During a reaction, an element loses 4.8 ´ 10-28 kg of mass (meaning it disappears and changes into pure energy). How much energy (in Joules) is released? (a) 4.32 ´ 10-11 J (b) 1.44 ´ 10-19 J (c) 1.6 ´ 10-36 J (d) 5.3 ´ 10-45 J

  • Answer:

    MC^2 = 4.8*10^-28 * (3 * 10^8)^2 = 4.8 * 9 * 10^12 = 4.32 * 10^-11 J So (a)

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e+mc2 energy= mass time the speed of light squared so the answwer is c

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