____ are simply variables used to store memory addresses.

 What is indirection operator and what does that mean? Define the term references in pointer.

What is the primary purpose of the groupby([“date”, “state”]) operation in this code snippet? # Assume ‘df’ is a Pandas DataFrame with ‘date’, ‘state’, ‘cases’, and ‘deaths’ columnsstate_grouped = df.groupby([“date”, “state”], as_index=False)[[“cases”, “deaths”]].sum()

What is the degree of freedom and number of vibration mode for a XeF4 complex?   

Methylene, CH2, plays an important role in many reaction. One possible structure of it is linear. Construct the molecular orbital diagram for this species and select which of the following is TRUE.  

Consider the coordination complex: [Co(CO)2(H2O)4]Cl2 Select all statements that are true about this complex.

A metal ion M2+ has a d7 electron configuration and forms an octahedral complex with a weak-field ligand. Select all statements that is/are TRUE.

Assign the correct point groups for the PF3 and BF3 

Select all statement that will cause the acidity of a strong acid to decrease when_______

A manufacturer of computer chips claims that less than 10% of its products are defective. When 1,000 chips are drawn from a large population, 7.5% are found to be defective.  What is the population of interest?