In the world of chemistry, a 'mole' is a number of something... a very large number of something
Just as a 'dozen' is 12 of something, a 'mole' is about 6.02 . 1023 of something,
In chemistry, we like to measure the number of atoms or molecules in moles.
If one mole is equal to 6.02 * 1023 atoms, and you have 7.00.1023 atoms, then how
many moles do you have?
Round your answer to two decimal places.

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.  

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.