Recent questions 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?

asked 21 hours ago in Chemical reactions by ReyesBoettch (610 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)

asked 21 hours ago in Chemical reactions by RichelleGros (510 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

asked 21 hours ago in Chemical reactions by CaryLangford (350 points)

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1 answer 32 views

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)

asked 21 hours ago in Chemical reactions by SamiraY20394 (430 points)

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

asked 21 hours ago in Chemical reactions by AlexandriaBr (410 points)

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1 answer 37 views

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?

asked 21 hours ago in Chemical reactions by VivienStamba (270 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)

asked 21 hours ago in Chemical reactions by BonnieEdens (370 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)

asked 22 hours ago in Chemical reactions by YasminDuncan (290 points)

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1 answer 35 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.

asked 22 hours ago in Chemical reactions by ClariceOrozc (290 points)

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1 answer 36 views

Find the oxidation state of chromium in the compound K2Cr2O7.

asked 22 hours ago in Chemical reactions by EwanSales325 (330 points)

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

asked 22 hours ago in Chemical reactions by WilburDunbar (550 points)

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Determine the oxidation state of sulfur in H2SO4.

asked 22 hours ago in Chemical reactions by JerrellBodin (510 points)

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

asked 22 hours ago in Chemical reactions by Agueda59157 (210 points)

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1 answer 26 views

Determine the oxidation state of chlorine in HClO3.

asked 22 hours ago in Chemical reactions by KieraVinci1 (690 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.

asked 23 hours ago in Chemical reactions by LeonardoHyla (710 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)

asked 23 hours ago in Chemical reactions by PaulineHarke (450 points)

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1 answer 5 views

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?

asked 1 day ago in Chemical reactions by KiaCherry527 (550 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.

asked 1 day ago in Chemical reactions by CareyKellerm (370 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?

asked 1 day ago in Chemical reactions by MarisaReich6 (550 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?

asked 1 day ago in Chemical reactions by PearlHayner4 (270 points)

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