Recent activity by IsidroKump49

1 answer 66 views

What are the key historical milestones in the development of the periodic table of elements, and how did they contribute to our understanding of chemical elements and their behavior?

answered Jan 30 in Chemical education

1 answer 59 views

A 5 g sample of a mixture containing sand and salt is dissolved in water. The solution is filtered, and the sand is collected and dried. The dried sand has a mass of 3 g. Using mass balance calculations, determine the percentage of salt in the original mixture.

answered Jan 22 in Analytical Chemistry

1 answer 55 views

Where does the concept of 'existential guilt' come from?

answered Jan 20 in Psychology

1 answer 28 views

When is theory evaluation necessary?

asked Jan 16 in Psychology

1 answer 22 views

According to the cognitive-behavioural approach, how are behaviours learned?

asked Jan 16 in Psychology

1 answer 22 views

What is disorganised attachment?

answered Jan 14 in Psychology

1 answer 20 views

When an action and reaction occur, what is transferred from one object to the other, yet in combination it remains the same?

asked Jan 8 in Science

1 answer 32 views

What transmits nerve impulses to other cells?

answered Jan 8 in Science

1 answer 47 views

What makes sunsets appear red?

answered Jan 7 in Science

1 answer 11 views

Radiometric dating methods, such as carbon-14 dating depend on what type of decay?

asked Dec 31, 2024 in Science

1 answer 28 views

Mirrors and lenses are used in optical instruments to reflect and refract what?

answered Dec 31, 2024 in Science

1 answer 33 views

If a human only has 45 chromosomes it is most likely due to a mistake during what?

answered Dec 30, 2024 in Science

1 answer 41 views

Genetic variation helps ensure that some organisms will survive if what happens?

answered Dec 30, 2024 in Science

1 answer 34 views

What is it in bone marrow transplants that may cause a graft versus host reaction?

asked Dec 27, 2024 in Science

...