Chemistry, 20.09.2020 14:01 bartekzelazek5083
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.
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Answers: 3
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To apply in a gold the individual gold atoms are united to each other by means of a metallic bond. how would you use the gold block to determine the atomic radius of a gold atom?
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A20 liter cylinder of helium at a pressure of 150 atm and a temperature of 27°c is used to fill a balloon at 1.00 atm and 37°c. what is the volume of the balloon? a. 0.14 liters b. 3000 liters c. 2900 liters d. 2400 liters e. 3100 liters
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Jill is pushing a box across the floor. which represents the upward force perpendicular to the floor? a) fp b) ff c) fn d) fg
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Consider the reaction: 2al(s) + fe2o3(s) → al2o3(s) + 2fe(s) the δhf for fe2o3(s) = -824.3 kj/mole. the δhf for al2o3(s) = -1675.7 kj/mole. finish the equation. δhrxn = [(1)( kj/mole) + (2)( kj/mole)] - [(1)( kj/mole) + (2) ( kj/mole)]
Answers: 1
9) Two students are working together to build two models. Both models will represent the
molecular...
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