Recent activity by NoahProctor

1 answer 34 views

Calculate the weight-average molecular weight of a polymer sample with the following information:- The polydispersity index (PDI) of the sample is 1.5.- The number-average molecular weight (Mn) of the sample is 20,000 g/mol. - The weight fraction (w) of the polymer with a molecular weight of 30,000 g/mol is 0.2, and the weight fraction of the polymer with a molecular weight of 10,000 g/mol is 0.8.

asked 2 days ago in Physical Chemistry

1 answer 22 views

Calculate the standard enthalpy change for the reaction in which 50 mL of 1.0 M HCl(aq) is added to 50 mL of 1.0 M NaOH(aq) at 25°C, given that the solution's specific heat capacity is 4.18 J g⁻¹ K⁻¹ and the density is 1.00 g/mL.

asked 2 days ago in Chemical thermodynamics

1 answer 33 views

How can chemistry teachers make their class more engaging and interesting for students who lack interest in the subject?

asked 6 days ago in Chemical education

1 answer 43 views

According to Maslow's hierarchy of needs, what are the five levels of human needs?

answered Jan 20 in Psychology

1 answer 19 views

When might cognitive restructuring be necessary?

asked Jan 17 in Psychology

1 answer 15 views

Where is the parsimony criterion applied in the theoretical models?

asked Jan 16 in Psychology

1 answer 45 views

Who pointed out the flaws in the positivist approach to psychology?

answered Jan 16 in Psychology

1 answer 43 views

According to rational emotive behaviour therapy, what is irrational thinking?

asked Jan 16 in Psychology

1 answer 20 views

How can metapsychology be used to unify diverse psychological theories?

answered Jan 16 in Psychology

1 answer 20 views

What is the meaning of posttraumatic growth?

asked Jan 14 in Psychology

1 answer 19 views

What is the term for the emotional and psychological consequences of exposure to stressful or traumatic events?

asked Jan 13 in Psychology

1 answer 56 views

What organ is made up of over one million nephrons that dot the renal cortex?

asked Jan 7 in Science

1 answer 24 views

What is a feature that prokaryotes lack?

answered Jan 6 in Science

1 answer 24 views

The deepest region of the adrenal cortex is the zona reticularis, which produces small amounts of a class of steroid sex hormones called what?

answered Dec 31, 2024 in Science

1 answer 22 views

Phosphorus exists as several allotropes, the most common being red, black, and what?

answered Dec 31, 2024 in Science

1 answer 50 views

Gas particles can move randomly in what directions?

asked Dec 30, 2024 in Science

1 answer 20 views

Double strands of what wrap around histone proteins to form nucleosomes, which are coiled into a chromatin fiber?

asked Dec 30, 2024 in Science

1 answer 60 views

Because atoms have equal numbers of positive protons and negative electrons, what kind of electric charge do they possess?

asked Dec 30, 2024 in Science

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