star030616
09.08.2021 •
Chemistry
The masses of a potassium-40 atom, a proton and a neutron are 39.963999 amu, 1.007825 amu and 1.008665 amu, respectively. Calculate to four significant figures the mass defect in amu and the energy released in MeV/nucleon, in the formation ofK1940from the appropriate number of protons and neutrons.
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Ответ:
D. Ratio of oxygen/nitrogen
Explanation: the ratio will never change no matter the air pressure!