vedros

28.11.2019 • 

Chemistry

In the early days of automobiles, illumination at night was provided by burning acetylene, c2h2. though no longer used as auto headlamps, acetylene is still used as a source of light by some cave explorers. the acetylene is (was) prepared in the lamp by the reaction of water with calcium carbide, cac2: cac2(s)+2h2o(l)⟶ca(oh)2(s)+c2h2(g). calculate the standard enthalpy of the reaction. the δh∘f of cac2 is −15.14 kcal/mol.

Ответ:

CheddaDsk

10.01.2023

Chemistry

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We are given with the endpoints  l(0, 1) and m(2, 8). y is said to be 3/5 of the total length between l and m. in this case, we take the 3/5 of the difference of both x's and  y's. the x-coordinate of x is 6/5 while the y-coordinate of y is equal to 21/5. hence the final coordiates of y is (6/5 , 21/5)

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