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sveta [45]
4 years ago
6

Which is a biological effect of the hydrogen bonding between molecules of water

Chemistry
1 answer:
Vedmedyk [2.9K]4 years ago
6 0
<span>Hydrogen bonding between water molecules is the foundation of multiple properties of water such as cohesion, adhesion, surface tension, water's high specific heat, three states, and low freezing point which all contribute to water sustaining life. The three states of water coupled with the low freezing point allows organisms living in aquatic systems in cold climates to be protected from the freezing air temperatures by the layer of ice that forms across the surface of lakes and rivers. The high specific heat of water allows it to be a wonderful cooling agent for people, the water molecules can absorb large quantities of heat before evaporating of our skin when we sweat carrying the heat away as well. The cohesion and adhesion properties of water allow the tips of the tallest trees in the Amazon and Sequoia National Park to still receive water.</span>
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Iteru [2.4K]

Answer:

False. Chemical changes are always physical changes

5 0
3 years ago
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How many atoms of magnesium are in a 134 gram sample of magnesium?
ryzh [129]
No. of moles in 134g of Mg, n=134/24 =5.58 moles
No. of atoms = n* Avogadro number
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6 0
4 years ago
Which statement defines reduction potential when considering a pair of half-cell reactions?
torisob [31]
Reduction is the gain of electrons, then potential of reducción is the tendency of a sustance to gain electrons. In this case the sustance is an electrode.

Then the reduction potential refers to the tendency of one electrode to gain electrons and it is measured against a standard electrode which is the electrode of hydorgen.

When you consider the pair of half-cell reactions, the potential of the cell is the reduction potential - oxidation potential.


3 0
3 years ago
How many electrons make up a charge of -50.0 μc ? Express your answer using three significant figures?
SVETLANKA909090 [29]

The charge on one mole of electrons = 96485 C =  1 Faraday

so if charge is 96485 C the moles of electrons are 1 = 6.023 X 10^23 electrons

if charge is 1 C the number of electrons = 6.023 X 10^23 / 96485

If charge is 50 micro C the number of electrons

              = 6.023 X 10^23 X 50 X 10^-6 / 96485

             = 3.12 X 10^14 electrons


5 0
3 years ago
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How does everyday activities like driving a car and using electricity lead to global warming?
algol13
The fossil fuels from cars go into the atmosphere causing global warming
6 0
4 years ago
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