B) with single bonds..... Hope it helps, Have a nice day :)
Answer:
tiny crystals of the mineral quartz, which is made out of silica and oxygen
Hey The cells on the plant that are farthest from the light have a chemical called auxin that reacts when phototropism occurs.
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Answer: The rate constant is
Explanation ;
Expression for rate law for first order kinetics is given by:

where,
k = rate constant = ?
t = age of sample = 4.26 min
a = initial amount of the reactant = 2.56 mg
a - x = amount left after decay process = 2.50 mg
Now put all the given values in above equation to calculate the rate constant ,we get



Thus rate constant is [tex]0.334s^{-1}