Recent activity by CassieEdmist

1 answer 31 views

Determine the VSEPR geometry of PCl5 molecule and predict the bond angles.

answered 1 day ago in Chemical bonding

1 answer 36 views

Design a distillation column to separate a mixture of ethanol and water. The feed stream contains 20 mol% ethanol and the desired distillate should contain at least 95 mol% ethanol. The reflux ratio should be 3:1 and the column should have 25 theoretical trays. Determine the composition of the distillate, bottoms, and the optimal feed tray location to achieve the desired separation. Use McCabe-Thiele method to determine the number of theoretical trays required.

answered 1 day ago in Chemical engineering

1 answer 64 views

Calculate the enthalpy of adsorption for the adsorption of 2.5 moles of nitrogen gas at 298 K on the surface area of 1 gram of activated charcoal, given that the partial pressure of nitrogen gas is 0.1 atm. The heat of vaporization of nitrogen is 5.6 kJ/mol. Express your answer in kJ/mol.

answered Jan 23 in ThermoChemistry

1 answer 47 views

A student needs to prepare 500 mL of a buffer solution with a pH of 7.5 using a weak acid HA and its conjugate base A-. HA has a pKa of 4.5 and its initial concentration is 0.2 M. What mass of HA and A- should be mixed to prepare the buffer solution?

answered Jan 22 in Chemical reactions

1 answer 46 views

When was the bystander effect first documented?

asked Jan 20 in Psychology

1 answer 34 views

When can social learning theory be applied?

answered Jan 20 in Psychology

1 answer 6 views

Compare the side-effect profiles of benzodiazepines and barbiturates.

asked Jan 16 in Psychology

1 answer 18 views

Who developed the continuing bonds theory?

asked Jan 15 in Psychology

1 answer 20 views

When electric current flows through a wire, it creates what type of field that surrounds the wire in circles?

answered Jan 8 in Science

1 answer 45 views

What objects are made from highly reflective metal that is applied to a curved or flat piece of glass?

answered Jan 7 in Science

1 answer 19 views

What is an extremely severe food allergy reaction?

asked Jan 6 in Science

1 answer 30 views

What do you call the transfer of thermal energy between particles of matter that are touching?

asked Jan 6 in Science

1 answer 21 views

Well suited to absorb water and dissolved minerals from the soil, thin-walled dermal cells and tiny hairs cover what basic plant structures?

answered Jan 2 in Science

1 answer 21 views

Body waves and surface waves are the two major types of what, which occur during earthquakes?

asked Dec 30, 2024 in Science

1 answer 15 views

What are the strongest chemical bonds?

asked Dec 27, 2024 in Science

1 answer 47 views

In humans, the first sites used for energy storage are liver and what else?

asked Dec 27, 2024 in Science

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