In a first-order decomposition reaction. 36.8% of a compound decomposes in 7.6 min. how long (in min) does it take for 88.8% of the compound to decompose?

36.5 minutes

Explanation:

Expression for rate law for first order kinetics is given by:

where,

k = rate constant  

t = age of sample

a = let initial amount of the reactant  = 100

a - x = amount left after decay process  

a) for completion of 36.8 % of reaction  

b) for completion of 88.8 % of reaction  

It will take 36.5 minutes for 88.8% of the compound to decompose.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.