146 questions and answers in this section

Natural Sciences » Chemistry

Explain why Marie Curie chose to dedicate herself to science.

Explain why Marie Curie chose to dedicate herself to science.

Marie Curie showed a keen interest in scientific phenomena from a young age. She was curious to understand how things worked and why natural phenomena...

Read full answer

Explain why do flames dance on a candle?

Explain why do flames dance on a candle?

Thermal convection plays a major role in the movement of a candle flame. When the flame burns, the hot air around it expands and becomes...

Read full answer

Explain why does coffee have such a distinct smell when freshly ground?

Explain why does coffee have such a distinct smell when freshly ground?

Coffee beans contain over 800 different aromatic compounds, which contribute to the distinctive smell of freshly ground coffee. Among these compounds are molecules such as...

Read full answer

Explain why does a dressing separate into distinct layers if we do not stir it?

Explain why does a dressing separate into distinct layers if we do not stir it?

When preparing a vinaigrette, two liquids that do not dissolve in each other are mixed: oil and vinegar for example. These two liquids have different...

Read full answer

Explain why molecular ingredients in perfumes create unique scents?

Explain why molecular ingredients in perfumes create unique scents?

Fragrances are complex compositions resulting from subtle blends of natural and synthetic ingredients. The most commonly used molecules in fragrances can be classified into several...

Read full answer

Explain why tempered glass is more resistant than ordinary glass?

Explain why tempered glass is more resistant than ordinary glass?

Tempered glass is a highly resistant material widely used in various applications, such as smartphones, car windshields, and shower panels. Its composition differs from that...

Read full answer

Explain why does foam form when pouring beer?

Explain why does foam form when pouring beer?

The formation of foam in beer is a fascinating process that results from various factors interacting in a complex way. When beer is poured into...

Read full answer

Explain why does mustard sting?

Explain why does mustard sting?

Mustard burns because of the presence of compounds called isothiocyanates. These compounds are created when mustard seeds are ground and mixed with a liquid, such...

Read full answer

Explain why do bath salts fizz in water?

Explain why do bath salts fizz in water?

When effervescent bath salts come into contact with water, they dissolve and cause an acid-base reaction. This reaction is due to the components of the...

Read full answer

Explain why is friction necessary to light a match?

Explain why is friction necessary to light a match?

A match is composed of several essential elements. First, the head of the match is made up of a flammable mixture, often containing potassium chlorate, antimony sulfide,...

Read full answer