An initial sample of 502 g of a radioactive substance decays according to the function A ( t ) = 502 e − 0.033 t where t is given in years. (a) How many grams of the substance will remain after 68 years? Round your answer to one decimal place.

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c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.

12 is it do you think so

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;