Recent activity by Valentina44X

1 answer 32 views

How can chemistry teachers provide hands-on experiences to students in remote learning environments where in-person laboratory access is limited?

answered 6 days ago in Chemical education

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Calculate the standard enthalpy change for the reaction of [Co(H2O)6]Cl2 and NaOH using the following balanced chemical equation and given standard enthalpies of formation:[Co(H2O)6]Cl2 (aq) + 2NaOH (aq) → [Co(H2O)6](OH)2 (s) + 2NaCl (aq)ΔH°f [Co(H2O)6]Cl2 (aq) = -415.32 kJ/molΔH°f [Co(H2O)6](OH)2 (s) = -1276.24 kJ/molΔH°f NaCl (aq) = -407.33 kJ/mol

answered Feb 3 in Chemical thermodynamics

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Calculate the standard enthalpy change for the precipitation reaction of copper(II) sulfate and sodium hydroxide, given the following balanced chemical equation:CuSO4(aq) + 2NaOH(aq) → Cu(OH)2(s) + Na2SO4(aq)Assume the reaction takes place under standard conditions and the necessary species are present in their standard states. Round your answer to two decimal places.

answered Feb 3 in Chemical thermodynamics

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Design a continuous stirred tank reactor (CSTR) for the exothermic reaction A + 2B -> C with the following conditions: - The reactor should produce a minimum of 5 moles of product C per hour- The feed ratio of A to B should be 1:2- The temperature of the reactor should not exceed 50°C- The volumetric flow rate of reactant feed is 10 L/hour- The reactor should have a residence time of at least 4 hours. Assuming all reactants are available in excess, determine:- The required volume of the CSTR- The heat generated by the reaction- The cooling rate required to maintain the reactor temperature below 50°C

answered Jan 30 in Chemical engineering

1 answer 51 views

Calculate the heat capacity of 50g of water when its temperature is raised from 25°C to 65°C.

answered Jan 23 in Chemical thermodynamics

1 answer 51 views

A solution contains 0.1 M of an unknown ion X. The electrode potential of this ion X is measured to be +0.60 V versus the standard hydrogen electrode (SHE). Calculate the concentration of ion X in the solution using electrochemical methods.

answered Jan 22 in ElectroChemistry

1 answer 33 views

What are the conditions that need to be in place for the contact hypothesis to work?

answered Jan 20 in Psychology

1 answer 23 views

How can the cognitive approach be applied to motivation?

asked Jan 16 in Psychology

1 answer 39 views

When can illusory motion occur?

answered Jan 15 in Psychology

1 answer 36 views

When do we experience perceptual filling-in?

asked Jan 15 in Psychology

1 answer 26 views

What is human hearing?

asked Jan 14 in Psychology

1 answer 37 views

What type of fertilization do most reptiles have?

asked Jan 8 in Science

1 answer 49 views

What process provides more than 99% of energy?

asked Jan 7 in Science

1 answer 25 views

What is an ion that is in common to both salts in a solution?

answered Jan 6 in Science

1 answer 37 views

What are the most advanced group of seedless vascular plants called?

answered Jan 3 in Science

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