ht (relative ass of an Exercises | 201 80. Calculate the mass percent composition of carbon in each compound. (a) CH2 (d) C¿H¿O SITAJUJA worEcnrvE EOUI 82. Calculate the mass percent composition of each element in How (d) HNO3 (b) C3H6 2AJUMAOR RAJU (c) C2H6 CATC each compound. (a) FeCl3 (b) TiO2 (c) H3PO4 84. Calculate the mass percent composition of Cl in each 979 compound. (a) carbon tetrachloride aninsinos ebruro (b) calcium hypochlorite DC perchloric acid (s) 86. Plants need nitrogen to grow, so many fertilizers consist of nitrogen-containing compounds. Calculate the mass percent composition of nitrogen in each fertilizer: NH3 CO(NH2)2, NH4NO3, (NH,),SO4. Which fertilizer has the highest nitrogen content? 978153 bedford/s w.h. fre 18 (c) 0.117 66. For each set of molecular models, write a relatio determine the total number of oxygen atoms les (H-white; O-red; C-black; S-yellow). (b) (c) (a) grams of sodium in 1.0 68. Calculate the number of sodium-containing food additive. (a) NaCl (table salt) (b) Na3PO4 (sodium phosphate) (c) NaC;H;O2 (sodium benzoate) (d) Na,C¿H¿O7 (sodium hydrogen citrate) D. Lead is found in Earth's crust as several lead Calculate the mass (in kg) of each compound 1.0 X 10 kg of lead. (a) PhS (

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