Write a balanced equation for the following chemical statements. (Use the lowest

Question

Write a balanced equation for the following chemical statements. (Use the lowest possible coefficients.)
(a) A characteristic reaction of Group 1A(1) elements: chunks of sodium react violently with water to form hydrogen gas and sodium hydroxide solution.
_____ Na(s) +_____ H2O(l)=_____ H2(g) +______ NaOH(aq)

(b) The destruction of marble statuary by acid rain: aqueous nitric acid reacts with calcium carbonate to form carbon dioxide, water, and aqueous calcium nitrate.
_____ HNO3(aq) + _____ CaCO3(s) = _____CO2(g) +____ H2O(l) +_____ Ca(NO3)2(aq)

(c) Halogen compounds exchanging bonding partners: phosphorus trifluoride is prepared by the reaction of phosphorus trichloride and hydrogen fluoride; hydrogen chloride is the other product. The reaction involves gases only.
_____PCl3(g) + ____ HF(g) = _____ PF3(g) + ______ HCl(g)

(d) Explosive decomposition of dynamite: liquid nitroglycerine (C3H5N3O9) explodes to produce a mixture of gases - carbon dioxide, water vapor, nitrogen, and oxygen.
_______ C3H5N3O9(l) =___ CO2(g) + ____ H2O(g) + ____ N2(g) + ______ O2(g)

Explanation / Answer

(a) A characteristic reaction of Group 1A(1) elements: chunks of sodium react violently with water to form hydrogen gas and sodium hydroxide solution. ___2__ Na(s) +___2__ H2O(l)=___1__ H2(g) +___2___ NaOH(aq) (b) The destruction of marble statuary by acid rain: aqueous nitric acid reacts with calcium carbonate to form carbon dioxide, water, and aqueous calcium nitrate. __2___ HNO3(aq) + ___1__ CaCO3(s) = __1__CO2(g) +__1_ H2O(l) +_1_ Ca(NO3)2(aq) (c) Halogen compounds exchanging bonding partners: phosphorus trifluoride is prepared by the reaction of phosphorus trichloride and hydrogen fluoride; hydrogen chloride is the other product. The reaction involves gases only. ___1__PCl3(g) + __3__ HF(g) = ___1__ PF3(g) + ____3__ HCl(g) (d) Explosive decomposition of dynamite: liquid nitroglycerine (C3H5N3O9) explodes to produce a mixture of gases - carbon dioxide, water vapor, nitrogen, and oxygen. _4_ C3H5N3O9(l) =__12_ CO2(g) + __10__ H2O(g) + __6__ N2(g) + __1__ O2(g)

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