18. How many liters of oxygen are needed to produce 34.0 g of water? Assume STP. a. 42.3LO
b. 21.1 LO
c. 21 LO
d. none of the above

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.  

the correct answer is:

a. formation of precipitation

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.