9) Two students are working together to build two models. Both models will represent the molecular structure of sodium bicarbonate, NaHCO3, commonly known as baking soda. The
students are using toothpicks to represent bonds and jelly beans to represent atoms. Red jelly
beans represent sodium atoms (Na), white jelly beans represent hydrogen atoms (H), black jelly
beans represent carbon atoms (C), and blue jelly beans represent oxygen atoms (O).
Identify the number of each color of jelly bean needed to make both models of NaHCO3.
Explain your reasoning.
Lo

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.

the answer is 75.0%.

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.