Chemistry, 03.01.2020 07:31 teyante7301
What is the mass of an original 5.60-gram sample of iron-53 that remains unchanged after 25.53 minutes? (1) 0.35g
(2) 1.40 g(3) 0.70 g
(4) 2.80 g
Answers: 1
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There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. in the first step, calcium carbide and water react to form acetylene and calcium hydroxide: cac2 (s) + 2h2o (g) β c2h2 (g) + caoh2 (s) =Ξ΄hβ414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) β 5ch2chco2h (g) =Ξ΄h132.kj calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide from these reactions. round your answer to the nearest kj .
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4786 joules of heat are transferred to a 89.0 gramsample of an unknown material, with an initialtemperature of 23.0Β°c. what is the specific heat of thematerialif the final temperature is 89.5 Β°c?
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What is the mass of an original 5.60-gram sample of iron-53 that remains unchanged after 25.53 minut...
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