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# Science 9 ## 11. Complete the following by using the coefficients and subscripts listed in the compounds below | Compound | Type of Atom | # of Atoms | |---|---|---| | Na₂CO₃ | Na | 2 | | | C | 1 | | | O | 3 | | 3BaCl₂ | Ba | 3 | | | Cl | 6 | | 4Al₂(CO₃)₃ | Al | 8 | | | C | 12 | | | O | 3...

# Science 9 ## 11. Complete the following by using the coefficients and subscripts listed in the compounds below | Compound | Type of Atom | # of Atoms | |---|---|---| | Na₂CO₃ | Na | 2 | | | C | 1 | | | O | 3 | | 3BaCl₂ | Ba | 3 | | | Cl | 6 | | 4Al₂(CO₃)₃ | Al | 8 | | | C | 12 | | | O | 36 | | Ca₃(PO₄)₂ | Ca | 3 | | | P | 2 | | | O | 8 | | NH₄C₂H₃O₂ | N | 1 | | | H | 7 | | | C | 2 | | | O | 2 | | Pb(NO₃)₄ | Pb | 1 | | | N | 4 | | | O | 12 | ## 12. What are the 3 laws of electric charges? Draw an example using balloons. ## 13. What is the difference between static and current electricity? ## 14. Determine the voltage of a circuit when the resistance of a circuit is 3 ohms and the current is 30 amps. V = R x I V = 3 x 30 V = 90 ## 15. What is the current of a circuit which has a voltage of 12 V and a resistance of 36 ohms? I = V / R I = 12 / 36 I = 0.33 ## 16. Determine the resistance of a circuit when a 120 V circuit has a current of 12 A.