21. A block of gold has a mass of 5.3 Kg. How many troy ounces of gold have? a. 170 oz c. 1.7 oz
b. 340 oz d. 1700 oz
22. You drive to Roswell, 73 miles, in 65 minutes. How fast did you drive in Km/hr?
a. 54 Km/hr c. 108.5 Km/hr
b. 41.8 Km/hr d. faster than the speed limit

yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes

explanation:

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 answer is either b or c

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.