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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
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1 day
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Chemical reactions
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44
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How does changing the molecular weight of a polymer affect its melt viscosity and how can this be quantitatively measured using rheological measurements such as shear rate and shear stress?
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2 days
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Polymer Chemistry
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How does changing the pressure of the reactants in a chemical reaction affect the rate of reaction, according to the collision theory?
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5 days
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Chemical kinetics
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Calculate the equilibrium constant, Kc, for the reaction below at 25°C if the concentration of CO2 is 1.2 M, the concentration of H2 is 0.8 M and the concentration of CO is 0.6 M.CO2(g) + H2(g) ⇌ CO(g) + H2O(g)
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Jan 23
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Chemical equilibrium
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24
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Where are the visual field defects commonly found in patients with macular degeneration?
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Jan 20
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Psychology
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30
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What is the term for the personal fable seen in adolescents?
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Jan 15
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Psychology
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20
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What is 'Technological Determinism'?
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Jan 14
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Psychology
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7
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Why are living things considered to be renewable?
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Jan 8
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Science
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31
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What do we call the movement of individuals into a population from other areas?
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Jan 6
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Science
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20
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What bodily system handles taking in oxygen, getting rid of carbon dioxide, aiding in speech production and sensing odors?
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Jan 6
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Science
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15
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What are the different feeding positions in a food chain or web called?
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Jan 3
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Science
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20
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Wave amplitude of a transverse wave is the difference in height between what and the resting position?
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Jan 2
in
Science
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