Recent questions and answers in Chemical reactions

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Here's a specific problem for the student to solve:If 5 grams of methane (CH4) reacts with 20 grams of oxygen (O2) to produce carbon dioxide (CO2) and water (H2O), which reactant is the limiting reactant and how much of the excess reactant remains after the reaction is complete?

answered 18 hours ago in Chemical reactions by LeesaStrub9 (530 points)

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Here's a precise problem for the student to solve in Balancing Chemical Equations:Balance the chemical equation for the reaction between iron (III) oxide and carbon monoxide to produce iron and carbon dioxide gas:Fe2O3(s) + CO(g) → Fe(s) + CO2(g)

answered 18 hours ago in Chemical reactions by RacheleChewi (570 points)

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Here's a precise problem for a chemistry student to solve:Using Hess's Law, calculate the enthalpy change for the reaction where 2 moles of methane (CH4) reacts with 4 moles of oxygen gas (O2) to form 2 moles of carbon dioxide (CO2) and 4 moles of water (H2O), given the following known enthalpy changes:ΔH1 = -890 kJ/mol for the reaction: CH4 + 2O2 → CO2 + 2H2OΔH2 = -394 kJ/mol for the reaction: C + O2 → CO2ΔH3 = -286 kJ/mol for the reaction: H2 + (1/2)O2 → H2O

answered 18 hours ago in Chemical reactions by ArianneDuhig (610 points)

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Here is a problem related to Hess's Law for the student to solve:Suppose you are given the following three equations, each with their respective enthalpy change: (1) 2H2(g) + O2(g) --> 2H2O(l) ΔH₁ = -572 kJ/mol (2) 2H2O(l) --> 2H2(g) + O2(g) ΔH₂ = 472 kJ/mol (3) C(s) + O2(g) --> CO2(g) ΔH₃ = -394 kJ/molUse Hess's law to calculate the enthalpy change (in kJ/mol) for the following reaction: C(s) + 2H2(g) --> CH4(g)

answered 18 hours ago in Chemical reactions by ErnestoBrook (570 points)

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Given the molecular formula FeCl3, determine the oxidation states of the iron and chlorine atoms in the compound.

answered 18 hours ago in Chemical reactions by TrevorMcClin (290 points)

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Given the following unbalanced chemical equation: Fe + HCl → FeCl3 + H2, what is the balanced equation for the reaction and how many moles of hydrogen gas will be formed when 0.25 moles of Fe react with an excess of HCl?

answered 18 hours ago in Chemical reactions by TomHatley066 (770 points)

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Given the following equations and their respective enthalpy changes:1) 2H2 (g) + O2 (g) → 2H2O (l) ΔH = -484 kJ/mol 2) C2H5OH (l) + 3O2 (g) → 2CO2 (g) + 3H2O (l) ΔH = -1,367 kJ/mol 3) C2H5OH (l) → C2H4 (g) + H2O (g) ΔH = +44 kJ/mol Using Hess’s Law, determine the ΔH for the following reaction: C2H5OH (l) → 2CO2 (g) + 3H2 (g)

answered 18 hours ago in Chemical reactions by DeanaSears12 (530 points)

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Given the chemical equation: N2 + 3H2 <-> 2NH3 and an initial concentration of N2 as 0.1M, H2 as 0.2M, and NH3 as 0. Calculate the equilibrium concentrations of each component at 298K if the reaction is exothermic and the pressure is increased. (Hint: Use Le Chatelier's principle to determine the direction of the shift and then use an ICE table to calculate the concentrations at equilibrium)

answered 18 hours ago in Chemical reactions by Dixie5711384 (470 points)

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1 answer 34 views

Given the chemical equation for the oxidation of iron (Fe) to form iron(III) oxide (Fe2O3), determine the oxidation state of iron in both the reactant and product.

answered 18 hours ago in Chemical reactions by LillieIst935 (310 points)

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Find the oxidation state of chromium in the compound K2Cr2O7.

answered 19 hours ago in Chemical reactions by MartinCadwal (450 points)

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Determine the oxidation state of the carbon atom in the molecule C2H5OH.

answered 19 hours ago in Chemical reactions by GabrielleBan (310 points)

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Determine the oxidation state of sulfur in H2SO4.

answered 19 hours ago in Chemical reactions by StaciStrub6 (450 points)

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Determine the oxidation state of each atom in the compound KMnO4.

answered 19 hours ago in Chemical reactions by MaryVanish19 (470 points)

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Determine the oxidation state of chlorine in HClO3.

answered 19 hours ago in Chemical reactions by Melinda41J1 (490 points)

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Determine the equilibrium constant (Kc) for the reaction 2NO(g) + O2(g) ⇌ 2NO2(g) if the initial concentration of NO is 0.15 M, O2 is 0.10 M and NO2 is 0.30 M at equilibrium.

answered 20 hours ago in Chemical reactions by LuellaJervoi (370 points)

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Determine the bond energy required to break all the bonds in a molecule of methane (CH4) and calculate the total energy required to break all the bonds in 4.0 moles of methane. (Assume the bond energy values are: C-H bond energy = 413 kJ/mol and C-C bond energy = 347 kJ/mol)

answered 20 hours ago in Chemical reactions by RodrigoBarkl (470 points)

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Consider the reaction:$$\mathrm{N_2(g) + 3H_2(g) <=> 2NH_3(g)}$$At a certain temperature, the equilibrium constant $K_c$ for this reaction is $5.6 \times 10^{-5}$. If a reaction vessel initially contains only $\mathrm{0.10\,mol}$ of $\mathrm{N_2}$ and $\mathrm{0.20\,mol}$ of $\mathrm{H_2}$, what will be the equilibrium concentrations of $\mathrm{N_2}$, $\mathrm{H_2}$, and $\mathrm{NH_3}$ once the reaction reaches equilibrium?

answered 1 day ago in Chemical reactions by JaquelineGel (450 points)

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Consider the reaction N2O4(g) ⇌ 2NO2(g) which is exothermic. If the pressure of the system is increased, predict the direction in which the equilibrium will shift, and explain your answer using Le Chatelier's principle.

answered 1 day ago in Chemical reactions by LinneaGoodma (410 points)

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Consider the following unbalanced chemical equation: Fe + HCl → FeCl3 + H2 A student needs to balance this chemical equation in order to determine the coefficients of each reactant and product. What are these coefficients, and how did you arrive at them?

answered 1 day ago in Chemical reactions by NormandDubay (270 points)

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Consider the chemical equation: Fe + H2SO4 → FeSO4 + H2 What is the coefficient of Fe when the equation is balanced using the smallest whole number coefficients?

answered 1 day ago in Chemical reactions by HXWEvie0029 (550 points)

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