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CHEMIstry 1-20 elements

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Verified questions

CHEMISTRY

Consider the following reaction at 1600 degree C. Br2 (g) <=> 2 Br (g) When 1.05 moles of Br2 are put in a 0.980-L flask, 1.20 percent of the Br2 undergoes dissociation. Calculate the equilibrium constant Kc for the reaction.

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PHYSICAL SCIENCE

Compare and contrast photosynthesis and cellular respiration.

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CHEMISTRY

A sample of oxygen gas has a volume of $20.0 \mathrm{cm}^{3}$ at $-10.0^{\circ} \mathrm{C}$. What volume will this sample occupy if the temperature rises to $110^{\circ} \mathrm{C}$?

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CHEMISTRY

An element occurs as a mixture of isotopes. The atomic mass of the element is based upon (1) the mass of the individual isotopes, only. (2) the relative abundances of the isotopes, only. (3) both the masses and the relative abundances of the individual isotopes. (4) neither the masses nor the relative abundances of the individual isotopes.

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