Determine the standard enthalpy of formation (in kj/mol) of calcium carbonate (\deltahf°) from the thermochemical equations given below. Ca(oh)2(s) \longrightarrow cao(s) + h2o(l) \deltah° = 65. 2 kj/mol-rxn ca(oh)2(s) + co2(g) \longrightarrow caco3(s) + h2o(l) \deltah° = -113. 8 kj/mol-rxn c(s) + o2(g) \longrightarrowco2(g) \deltah° = -393. 5 kj/mol-rxn 2 ca(s) + o2(g) \longrightarrow 2 cao(s) \deltah° = -1270. 2 kj/mol-rxn.
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SAT, 25.06.2019 22:00, QuestionsAnsweredNow
The ancestors of horses possessed feet with five digits. over time, with the development of grasslands, the digits fused and formed hooves. what evolutionary advantage did this transformation serve? a. it allowed them to climb rocky surfaces with ease. b. it allowed them to graze better. c. it enabled them to run faster from predators. d. it let them see clearly through the grasslands. e. it made them taller.
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SAT, 27.06.2019 06:00, silveryflight
The equation 24x2+25x−47ax−2=−8x−3−53ax−2 is true for all values of x≠2a, where a is a constant. what is the value of a? a) -16b) -3c) 3d) 16
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Determine the standard enthalpy of formation (in kj/mol) of calcium carbonate (\deltahf°) from the t...
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