chemistry page 2

aqueous phospheric acid and aqueous calcium hydroxide react to form solid calcium phosphate and water. write a balanced chemical equation for this reaction.

2H3PO4(aq) + 3Ca(OH)2(aq) → Ca3(PO4)2(s) + 6H2O(aq)

balance the following equation. what is the coefficient for hydrogen fluoride? SiO2 + HF → SiF4 + H2O

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balance the following equations enter 1 as a coefficiant for reactants and products which have no coefficient. __CO2(g) + __H2O(i) → __C6H12O6(s) + __O2(g)

6CO2(g) + 6H2O(i) → 1C6H12O6(s) + 6O2(g)

balance the following equations enter 1 as a coefficiant for reactants and products which have no coefficient. __(NH4)2Cr2O7(s) → __Cr2O3(s) + __N2(g) + __H2O(g)

1(NH4)2Cr2O7(s) → 1Cr2O3(s) + 1N2(g) + 4H2O(g)

write word equations for the following skeleton equations CaCl2(aq) + Na2SO4(aq) → CaSO4(s) + NaCl(aq)

calcium chloride(aq) + sodium sulfate(aq) → calcium sulfate(s) + sodium chloride(aq)

in a chemical equation, the number written in front of a chemical formula is...

coefficient

explain why it is important to reduce coefficients in a balanced equation to the lowest-possible whole-number ratio.

coefficients in the lowest ratio most clearly indicates the relative amount of substances in a reaction

write word equations for the following skeleton equations cu(s) + O2(g) → CuO(s)

copper(s) + oxygen(g) → copper(ii)oxide(s)

a balanced chemical equation is a ditrect presentation of...

law of conservation of mass

write word equations for the following skeleton equations K(s) + H2O(I) → KOH(aq)

potassium(s) + water(i) → potassium hydroxide(aq) + hydrogen(g)