3 years ago

Why must the red blood cells and the solution in the beaker be isotonic?

1 answer:

5 0

If a cell is placed in an isotonic solution, there will be no net flow of water into or out of the cell, and the cell's volume will remain stable. If the solute concentration outside the cell is the same as inside the cell, and the solutes cannot cross the membrane, then that solution is isotonic to the cell.

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26.0 g of a liquid that has a density of 1.44 g/mL needs to be measured out in a graduated cylinder. what volume should be used

Vaselesa [24]

As Density = Mass/Volume
Mass = 26.0g
Density = 1.44g/mL
Therefore Volume = Mass/Density
=> Volume = 26.0/1.44 = 18.055... = 18.1mL (to 3 sig figs)

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3 years ago

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The cube has a mass of 72.9 g. What is its density in g/cm3? What substance is it?

sashaice [31]

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Going by the density, the cube is made of Aluminium - density is a fairly unique quantity

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Pepsi [2]

The answer is C as it slowly destroys the ozone layer

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Materials: • One disposable plastic cup • One disposable plastic spoon (plastic fork or knife may be used instead) • Thermometer

Leya [2.2K]

I'm not sure what the question is, this is a lab proecdure

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