Pick three properties of water that you think are the most important for life to exist.

Chemistry

1 answer:

dangina [55]3 years ago

6 0

Answer:

Water's unique density, high specific heat, cohesion, adhesion, and solvent abilities allow it to support life.

Explanation:

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Write the symbol for nitrogen which has 9 neutrons<br><br>How do I solve this?

diamong [38]

If you mean lewis dot symbol you need a nuclide you get the number of proton (z) its equal to electrons since the atom is nutral then you make the elctron configuraion after that you take the number of electrons on the outer energy level( ex:k²L² in this case its the 2 on the L)and if you have 7 electrons and the atom is nitrogen so it becomes
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3 years ago

A table has several directional compasses, several lengths of wire, a battery, an ammeter, a light bulb, a battery holder and a

prisoha [69]

<span>A permanent magnet
Reactivate</span>

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In the balanced reaction and using the mole ratio:

NikAS [45]

12 moles are needed because stoichiometry is 1:2

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4 years ago

Explain the advantage of using scientific names,

posledela

Answer:

Clarity and precision - these names are unique with each creature having only one scientific name. Helps avoid confusion created by common names. 3. Universal recognition - scientific names are standardised and accepted universally

Explanation:

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3 years ago

Ethanol is added to gasoline to produce E-15 and E-85. It promotes more complete combustion of the gasoline and is an octane boo

Artist 52 [7]

Answer:

2,2,4-trimethylpentane has the higher heat of combustion in kcal/mol.

Explanation:

Heat of combustion is defined as heat evolved on combustion of 1 mole of a substance.

2,2,4-trimethylpentane has the higher heat of combustion in kcal/mol.

Heat combustion of 2,2,4-trimethylpentane = (1304 kcal/mol) and

$C_8H_{18}+\frac{25}{2}O_2\rightarrow 8CO_2+9H_2O,\Delta H=-1,304 kcal/mol$

1 mole of 2,2,4-trimethylpentane on combustion gives 8 mole sof carbon dioxide gas and 9 moles of water.

Heat combustion of ethanol = (327 kcal/mol)

$C_2H_5OH+3O_2\rightarrow 2CO_2+3H_2O,\Delta H=-327kcal/mol$

1 mole of ethanol on combustion gives 2 moles of carbon dioxide gas and 3 mole of water.

Heat combustion of ethanol < Heat combustion of 2,2,4-trimethylpentane

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3 years ago