50% - you have two bb pairs
Answer:
1. bond in the molecule on the right
Explanation:
CH3CH2-OH
The compound above is an alcohol due to the presence of the OH bond. The wave number of the C - O bond is given as; 1050-1150 cm^-1.
CH3CH__O
The compound above is an aldehyde due to the presence of the CHO bond. The wave number of the C = O bond is given as; 1740-1720 cm^-1
Comparing both bonds, the C = O bond absorbs at a higher wave number.
The answer is (3) moles of solute per liter of solution. That is what the definition of molarity of a solution means. The equation is concentration = mol number of solute/ volume of solution.
Answer: The time after which the concentration of 
fall to 12.5% of its initial value is 26.2 hours
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 = 12.5
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) for concentration to fall to 12.5 % of initial value
The time after which the concentration of fall to 12.5% of its initial value is 26.2 hours
