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What is an example where heating a substance provides a mixture of its constituent elements?
Cinnabar is bright red mercuric sulfide. Heating decomposes this material to give mercury metal and sulfur. $HgS(s) + Delta rarr Hg(l) + S(s)$ The mercury metal may be collected by...
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Why does water have different properties than its constituent elements?
We represent the synthesis reaction of water by: $H_2(g) + 1/2O_2(g) rarr H_2O(l) +Delta$ Now this is a redox reaction in that hydrogen has been oxidized, and oxygen has been...
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What is the formation reaction of aluminum chloride molecule and its enthalpy of formation?
You may also mean the liquid or the gas, but I assume you mean the solid. Thus, I assume you mean the process that produces $"AlCl"_3(s)$ from the elemental states...
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I measured $"5.00 g"$ copper sulfate solid and $"6.530 g"$ zinc. If for this reaction $q_(rxn) = "979.72 cal"$ of energy was involved, why is my percent error of the standard enthalpy of reaction for the reaction of zinc with copper sulfate so big???
Based on the information I got from you: $m_"Zn" = "6.530 g"$ $m_("CuSO"_4cdot5"H"_2"O") = "5.00 g"$ (in lab you tend to be handed the hydrate) From the molar...
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Zinc reacts with water to produce zinc hydroxide and hydrogen gas. What is the equation for this reaction?
To get this chemical equation, all you have to do is reference the question because it already gives you all of the you need. To get the formula for...
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Zinc oxide reacts with hydrochloric acid to produce zinc chloride and dihydrogen monoxide. If 3.6 moles of zinc oxide reacts with an excess of hydrochloric acid, then how many grams of zinc chloride were produced?
The reaction happening in solution is the following: $ZnO(aq)+2HCl(aq)->ZnCl_2(aq)+H_2O(l)$ Since the hydrochloric acid ($HCl$) is in excess, therefore, the number of moles of Zinc oxide ($ZnO$) will determine the mass...
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What mass of $"potassium chloride"$ would result from the redox reaction of $"potassium chlorate"$? How is the reaction represented stoichiometrically?
Often a little $"manganese(IV) oxide"$ is added to these reactions, as an oxygen transfer reagent, i.e. a catalyst. Given the , moles of $"potassium chloride"$ produced are CLEARLY equal...
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How many grams of solid zinc metal will completely react with 100.0 mL of 0.0525 M HCl, if zinc chloride and hydrogen gas are the only products?
The first step is to write the stoichiometric equation, in order to establish the molar equivalence......... $Zn(s) + 2HCl(aq) rarr ZnCl_2(aq) + H_2(g)uarr$ And then we use the relationship,...
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Sally and Sam reacted 20.0 mL of 1.0 M silver (I) chloride with metallic zinc in class. Sam and Sally collected 0.85 g of zinc chloride. What is the percent yield?
Start by writing a balanced chemical equation for this $"Zn"_text((s]) + color(red)(2)"AgCl"_text((aq]) -> "ZnCl"_text(2(aq]) + 2"Ag"_text((s])$ Notice that you have a $color(red)(2):1$ between silver chloride and...
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Suppose a thin sheet of zinc containing 0.2 mol of the metal is completely converted to zinc oxide, $"ZnO"$, in one month. How would you express the rate of conversion of the zinc?
Unless the question is incomplete, all you really have to do here is pick a unit of quantity and a unit of time and use the information given to express...
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