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15) Number of neutrons in is: a. n=23 b. n=11 c. n=12 16) Which of the following formulas represents a saturated hydrocarbon? a. C2H6 b. C2H4 c. C3H6 d. C5H10 18) The chemical formula of Iron (III) chloride is written as: FeCL FeCL3 FeCL2 19) The chemical formula of Iron (II) chloride is written as: FeCL FeCL3 FeCL2 20) Nitrogen monoxid is written as: a) NO b) NO2 c) N2O 21) dinitrogen monoxid is written as: a) 2NO b) NO2 c) N2O 22) The general formula for the alkane series is a) CnHn b) CnH2n c) CnH2n+2 d) CnH2n-2. 23) The general formula for the alkene series is a) CnHn b) CnH2n c) CnH2n+2 d) CnH2n-2.
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