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3 years ago

What would happen if this cell were moved from pure water to a seawater solution?

1 answer:

3 0

The cell would swell and burst, because the 20% salt solution is hypotonic with respect to the cell, causing a net movement of water into the cell. Example, water moves from the blood filtrate that will form urine. The same will do while pure water moved to seawater.

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Increasing the temperature increases the vaporization rate of a liquid because the excess energy is used to break covalent bonds

igor_vitrenko [27]

Answer:

False

Explanation:

False. The molecules of liquid are hold in the liquid state due to intermolecular forces or Van de Waals forces , without affecting the molecule itself and its atomic bonds (covalent bonds). When the temperature increases the kinetic energy of the molecules is higher , therefore they have more possibilities to escape from the attractive intermolecular forces and go to the gas state.

Note however that this is caused because the intermolecular forces are really weak compared to covalent bonds, therefore is easier to break the first one first and go to the gas state before any covalent bond breaks ( if it happens).

A temperature increase can increase vaporisation rate if any reaction is triggered that decomposes the liquid into more volatile compounds , but nevertheless, this effect is generally insignificant compared with the effect that temperature has in vaporisation due to Van der Waals forces.

4 0

3 years ago

Please calculate the mixed volume (Vmix) when 0.300 mol of ethanol and 0.200 mol of water are mixed. Hint: The partial molar vol

Grace [21]

Answer:

If we assume the molar volumes of water and ethanol 17.0 and 57.0 cm³/mol, respectively, Vmix = 20.5 cm³.

Explanation:

The molar volume of a substance is the ratio between the volume and the number of moles of the substance. It represents the volume that 1 mol of it occupies. Because we don't have access to page 24, let's assume the molar volumes of water and ethanol 17.0 and 57.0 cm³/mol, respectively.

The volume of mixture (Vmix) is the sum of the volume of each substance, which is the number of moles multiplied by molar volume, so:

Vmix = 0.300*57 + 0.200*17

Vmix = 17.1 + 3.4

Vmix = 20.5 cm³

7 0

3 years ago

Is mass conserved when 50 g of sugar undergoes a physical change?

Lena [83]

Yes, mass never changes. No exceptions.

6 0

3 years ago

Read 2 more answers

What is the compound name to C5H6?

Masja [62]

What you know about rollin' down in the deep?

When your brain goes numb, you can call that mental freeze

When these people talk too much, put that stuff in slow motion, yeah

I feel like an astronaut in the ocean, ayy

3 0

3 years ago

Read 2 more answers

Define the following terms. a. Capillary action b. Chromatogram

jonny [76]

Answer:

1.Capillary action is important for moving water (and all of the things that are dissolved in it) around. 

2.the pattern formed on an adsorbent medium by the layers of components separated by chromatography. 

Explanation:

hope this help you

6 0

3 years ago