There are doctors and nurses wearing scrub dresses, shoe covers, and surgical masks in the operating room. In which specific zone are these health
care providers?
A. Zone 3
B. Zone 1
C. Zone 2
D. Zone 4

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Consider the reaction: 2al(s) + fe2o3(s) → al2o3(s) + 2fe(s) the δhf for fe2o3(s) = -824.3 kj/mole. the δhf for al2o3(s) = -1675.7 kj/mole. finish the equation. δhrxn = [(1)( kj/mole) + (2)( kj/mole)] - [(1)( kj/mole) + (2) ( kj/mole)]

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?