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podryga [215]
3 years ago
11

I'm taking online classes I need to know, what is chemistry?

Biology
2 answers:
Marina CMI [18]3 years ago
6 0

its sorta like science but not quite.You learn more about matter,its properties,and what reactions substances have when combining some together

Snezhnost [94]3 years ago
3 0
Besides a pain to study and ace it's tests, it is <span>the branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.</span>
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The portion of the vascular plant that has the majority of the methods of asexual reproduction occurring in it is the _____.
posledela
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You have an egg that has an internal 7% salt concentration and you put it into a bowl of 3% salt water. What is the tonicity of
igomit [66]

Answer:

Egg is HYPERTONIC

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Explanation:

Tonicity refers to the ability of an extracellular solution to direct the flow of a solvent (water) in and out a cell. There are three types of tonicity; hypertonic, hypotonic and isotonic. A solution is said to be HYPERTONIC when the concentration of solute in it is higher than its external solution. This is the case of the egg cell that contains 7% salt (solute).

A HYPOTONIC solution is that which contains a lower solute concentration than it's external solution. This is the case of the water in the bowl that contains 3% salt concentration.

Tonicity determines which direction osmosis occurs. Osmosis is the movement of solvent/water from a region of high solvent concentration/low solute to a region of low solvent concentration/high solute concentration via a semi-permeable membrane. In this case, water (solvent) will move through the egg cell membrane (semi-permeable membrane) from the bowl with a low solute concentration into the egg with a high solute concentration. Hence, over time, the egg cell will be filled with water.

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3 years ago
Please I need help with this any help is greatly appreciated.
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Write down four differences between plant and animal cell
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Plant cells have cell wall but animal cell doesn't

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