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Alex787 [66]
3 years ago
6

How would you classify salt water?

Chemistry
1 answer:
Masja [62]3 years ago
6 0

Answer:

D

Explanation:

A. Is wrong

Salt water is not an element. In fact it contains sodium and chlorine asides the elements of the water

B is wrong

It is a mixture but it is not heterogeneous. It is not heterogeneous in the sense that when you take a sample of salt, the composition is throughout the same I.e containing salt and water

C is incorrect

It is a mixture of salt and water. They are both compounds and hence they both exist together as a mixture

D is correct

It is correct because, a sample of salt water irrespective of the amount taken for observation would contain salt and water

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Answer:

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Explanation:

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Help!!!!!!!!!!!!!!!!!!
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The density of the sample : 0.827 g/L

<h3>Further explanation</h3>

In general, the gas equation can be written  

\large {\boxed {\bold {PV = nRT}}}

where  

P = pressure, atm , N/m²

V = volume, liter  

n = number of moles  

R = gas constant = 0.082 l.atm / mol K (P= atm, v= liter),or 8,314 J/mol K (P=Pa or N/m2, v= m³)

T = temperature, Kelvin  

n= 1 mol

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mass of Neon :

\tt mass=mol\times MW\\\\mass=1\times 20,1797 =20.1797~g

The density of the sample :

\tt \rho=\dfrac{m}{V}\\\\\rho=\dfrac{20,1797}{24.4}=0.827~g/L

or We can use the ideal gas formula ta find density :

\tt \rho=\dfrac{P\times MW}{RT}\\\\\rho=\dfrac{1\times 20.1797}{0.082\times 298}\\\\\rho=0.826~g/L

8 0
3 years ago
Balance equation for. _Mg + _H3(PO4) --_Mg3(PO4)2+ _H2
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Answer:

dipole-dipole

Explanation:

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Dipole-dipole attraction are intermolecular bonds. Both London dispersion forces and dipole-dipole attraction are van der waals forces.

In dipole-dipole attraction, polar molecules (unsymmetrical molecules) line up such that the positive pole of one molecule attracts the negative pole of another. Example of such is found in HCl.

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The egg will gain mass.

Explanation:

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