Drawn below is the structure of Singulair (montelukast), a medication used to manage athsma. Assign the absolute configuration of the chirality center as R or S. 
Definitions:
Tetanus Toxoid
A vaccine used to prevent tetanus by generating an immune response without causing the disease.
Puncture Wound
A deep wound caused by a pointed object piercing the skin.
Blistered Area
A region of skin showing blisters, which are fluid-filled bumps resulting from friction, burns, or other irritations.
Sacral Pressure
Pressure exerted on the sacral area of the spine, often leading to discomfort or pressure ulcers in individuals with limited mobility.
Q20: Predict the product for the following reaction.
Q33: Predict the sign of ∆S for the
Q34: Will the following cation undergo rearrangement? <img
Q44: Draw the resonance structure indicated by the
Q60: Identify the sequence of curved arrows (electron
Q71: What is a compound that does not
Q111: The alkene precursor to ethanol is _.
Q115: How many lone pairs of electrons are
Q148: What is the expected Markovnikov addition product
Q151: The indicated bond in the following compound