Adeficiency of calcium can lead to: (points : 2)
a. scurvy
b. anemia
c. nausea
d. osteoporosis

4nh3+5o2--> 4no+6h20what is the total number of moles of h2o produced when 12 mole of nh3 is completely consumed?

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.