Recent activity by DonnyBustama

1 answer 27 views

How can the mechanical, thermal and flame-retardant properties of polymer-based composites be optimized to make them suitable for use in aerospace applications, such as aircraft interiors and structures?

answered 1 day ago in Polymer Chemistry

1 answer 35 views

How can chemistry students with limited access to extracurricular activities still gain practical experience and develop their skills outside of classroom instruction?

answered 6 days ago in Chemical education

1 answer 50 views

Calculate the enthalpy of formation of water (H2O) given the enthalpies of formation of hydrogen gas (H2) and oxygen gas (O2) are -286 kJ/mol and 0 kJ/mol, respectively.

answered Jan 23 in ThermoChemistry

1 answer 92 views

A chemistry student is studying the reaction between hydrogen gas and iodine gas to form hydrogen iodide gas. The student has collected data on the concentration of hydrogen and the rate of reaction at different times. Using the collected data, calculate the rate constant of the reaction between hydrogen and iodine gas.

answered Jan 22 in Chemical kinetics

1 answer 29 views

A chemical engineer needs to separate a mixture of ethanol and water using a distillation column. The feed to the column has 30 mol% ethanol and 70 mol% water, and the desired distillate composition is 95 mol% ethanol. The feed rate is 100 kmol/hour and the reflux ratio is 2. Calculate the number of theoretical trays required in the column to achieve the desired distillate composition.

answered Jan 22 in Chemical engineering

1 answer 38 views

How can social facilitation be used to promote pro-social behaviour?

answered Jan 20 in Psychology

1 answer 38 views

Why is identifying the audience important when creating a persuasive message?

asked Jan 17 in Psychology

1 answer 9 views

What is the gate control theory of acupuncture?

answered Jan 16 in Psychology

1 answer 18 views

Why is the attachment theory criticised?

answered Jan 16 in Psychology

1 answer 32 views

What is the cognitive theory of personality?

asked Jan 15 in Psychology

1 answer 28 views

Who discovered that the andromeda nebula is over 2 million light years away

answered Jan 8 in Science

1 answer 26 views

What theory of evolution is charles darwin most known for?

answered Jan 8 in Science

1 answer 9 views

The right side of the heart collects what type of blood from the body?

answered Jan 2 in Science

1 answer 36 views

What begins when a neuron receives a chemical stimulus?

answered Dec 28, 2024 in Science

1 answer 66 views

What two forces tend to keep an animal stationary and thus oppose locomotion?

asked Dec 27, 2024 in Science

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