Select the correct answer. In which of the following equations will Ke = K?
OA. 2H2(g) + C2H2(g) = C2H6(g)
OB. 2NO(g) + O2(g) = 2NO2(g)
OC. N2(g) + O2(g) = 2NO(g)
OD. 2H2(g) + O2(g) = 2H20 (g)
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Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

Which characteristics can be used to differentiate star systems? check all that apply.