1. Write the correct chemical formula with

1. Write the correct chemical formula with the following ions a. Ca and Cl b. Mg and O c. K and O d. Pb+4 and F e. Al and O f. Fe+3 and S g. Na and C h. Li and 2 Write the chemical formulas containing compound ions a. Ca and hydroxide b. ammonium and Cl c. Cu+2 and sulfate d. K and sulfite e. Mg and dihydrogenphosphate f. Na and carbonate g. Ba and nitrate h. Mg and phosphate Now balance hydrogens CH4(g) + O2(g) CO2 (g) + 2H2O(g) Finally balance oxygen CH4(g) + 2O2(g) CO2 (g) + 2H2O(g) For ethane the sequence is: 1. Carbons are balanced C2H6(g) + O2(g) 2CO2 (g) + H2O(g) Now balance hydrogens C2H6(g) + O2(g) 2CO2 (g) + 3H2O(g) Finally balance oxygen C2H6(g) + 7/2O2(g) 2CO2 (g) + 3H2O(g) Again there is a divisor of 2. Multiply them all by 2. 2C2H6(g) + 7O2(g) 4CO2 (g) + 6 3 Balance the reaction equations a. NaCl(aq) + Pb(NO3)2(aq) NaNO3 (aq) + PbCl2(s) b. CaBr2 (aq) + Na2CO3 NaBr (aq) + CaCO3(s) c. HCl(aq) + Ba(OH)2(aq) H2O(l) + BaCl2(aq) d. C3H8(g) + O2(g) CO2(g) + H2O(l) e. Mg(s) + HCl(aq) MgCl2(aq) + H2(g) f. CuSO4(aq) + NaOH(aq) Cu(OH)2(s) + Na2SO4(aq) SCIENCE HEALTH SCIENCE NURSING CHM 125

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