Questions by DexterKier30

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1 answer 26 views

Calculate the rate of electroplating of copper on a metallic surface at a current of 2.5 amperes for a duration of 3 hours using a copper nitrate solution with a concentration of 0.2 M. Given that the standard potential of the reduction reaction of Cu2+ to Cu is +0.34 V and the charge of one mole of electrons is 96500 C/mol.

asked 2 days ago in ElectroChemistry

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1 answer 49 views

Calculate the heat of combustion for propane gas, C3H8(g), if 12.5 grams of propane are completely burned in excess oxygen gas and the products of reaction are cooled from 700°C to 25°C. The heat capacities of the reactants and products are as follows: C3H8(g): cp = 44.10 J/K O2(g): cp = 29.38 J/K CO2(g): cp = 36.8 J/K H2O(g): cp = 33.6 J/K Assume that the heat capacities of the products and reactants are constant over the temperature range of the reaction and that the heat lost to the surroundings is negligible.

asked Jan 23 in ThermoChemistry

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1 answer 5 views

Assuming complete combustion, what is the amount of heat energy released when 25 grams of methane (CH4) is burned completely in oxygen gas (O2)? The enthalpy of combustion for methane is -890.4 kJ/mol.

asked Jan 22 in ThermoChemistry

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1 answer 34 views

How can repetition influence persuasion?

asked Jan 20 in Psychology

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1 answer 29 views

What is the main criticism of existential psychology?

asked Jan 17 in Psychology

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1 answer 16 views

What is depression?

asked Jan 13 in Psychology

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1 answer 47 views

What type of tissue is blood?

asked Jan 8 in Science

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1 answer 47 views

Nitrogen and sulfur oxides form what type of rain?

asked Dec 31, 2024 in Science

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1 answer 23 views

Molds and yeasts are organisms in what kingdom?

asked Dec 31, 2024 in Science

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