Answer: 6.1 mg
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
a - x = amount left after decay process
a) for completion of half life:
Half life is the amount of time taken by a radioactive material to decay to half of its original value.


b) sample remains after 1.4 days




The sample remains after 1.4 days is 6.1 mg
The turnover number (number of molecules the enzyme can act on per second) for lactase dehydrogenase is 1,000 lactate molecules per second.
In one minute, this becomes:
(1,000 molecules / second) * (60 seconds / minute)
= 60,000 molecules / minute
In 21 minutes, this will be:
60,000 * 21
= 1.26 x 10⁶ molecules of lactate
Answer:
B) flat trigonal
Explanation:
All the Hydrogen atoms are arranged symmetrically around the Nitrogen atom which forms the base, and the two nonbonding electrons form the tip
Answer:
The energy of the reactants.