Determine whether a compound of indium and fluorine with a melting point of 1170 °C and a boiling point of greater than 1200 °C is covalent or ionic. Write the most probable formula of this compound. 

Identify the bond present in MgAt₂. 

i. ionic bond 

ii. covalent bond 

iii. coordinate covalent bond 

(Note: More than one type of bond can be present in a compound)

Which of the following contains a covalent coordinate bond? (Hint: Estimate the number of covalent bonds that the central atom should form.) 

i. ZnF₂

ii. Al₂Cl₆

iii. CO

Identify either the name or the chemical formula for each of the given compounds: 

A. Boron Nitride

B. Tetraphosphorous trioxide

C. Nitrous acid

D. Silver Chlorite

E. Sn₃N₄

F. FeSO₃

G. IBr₃

H. SCl₆

Identify the formula of the compounds with the names given below: 

a. carbon tetrachloride

b. diboron trisulfide

c. xenon tetrafluoride

d. iodine monochloride

e. phosphorus pentasulfide

The given diagram illustrates a gaseous chemical reaction, where gray spheres denote carbon atoms, and red spheres denote oxygen atoms. Provide the molecular formula of the reactants and products.

Write the most probable formula for: (note that x in each case represents an unknown subscript)

(i) CH_xF₃

(ii) BF_x

(iii) NH_x

(iv) SiF_x

Phosphine is a highly flammable gas used in semiconductor industries. Determine the number of valence electrons, lone pairs, and bonding pairs in phosphine based on its Lewis structure given below:

Is the given image a possible structural formula for C₅H₁₀O₂?

If not, describe the changes that need to be done so that it becomes a more possible structure.

Draw the Lewis structure of PHF₂ so that the central P atom obeys the octet rule. Based on the drawing, answer the following:

The central P atom has ____ unshared pairs (lone pairs). 

The central P atom forms ____ single bonds.

The central P atom forms ____ double bonds.

Which of the following statements is correct?

Show the best Lewis dot structure for NOF (nitrosyl fluoride). Note that N here is the central atom.

Draw the Lewis structures of each of the following molecules or ions:

A. IF₂^–

B. XeBr₄

C. NO

D. BH₃

E. OPCl₃