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4 years ago

Using examples, how can you look at a substance and determine if it is a pure substance or a mixture?

1 answer:

3 0

A pure substance is something that is not mixed with anything like like a jar of rice or a jar of marbles
A mixture is something that is mixed together like if you made lemonade and you mixed lemon juice and water and sugar together it's a mixture and another example is if you mix sand and rocks together it's a mixture I hope I helped you

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The ideal mechanical advantage of a machine is solved disregarding friction. TrueFalse

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What is the relationship between density and viscosity?

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The strongly polar, hydrogen-bonding properties of water make it an excellent solvent for ionic (charged) species. By contrast,

trapecia [35]

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hello your question is incomplete attached below is the complete question

Pyridinium ion is more soluble in 0.1 M HCL (aqueous solution) and this is because the Pyridine ion reacts with NaOH and after the reaction it comes out neutral.

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Explanation:

Pyridine ion is more soluble in 0.1 M HCL (aqueous solution) and this is because the Pyridine ion reacts with NaOH and after the reaction it comes out neutral.

N-acetyltyrosine methyl ester is more soluble in 0.1 M HCL while

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4 years ago

Calculate the standard enthalpy of the reaction, ΔH∘rxn, for the thermite reaction: 2Al(s)+Fe2O3(s)→2Fe(s)+Al2O3(s) Elements in

alina1380 [7]

Answer:

The answer to your question is: ΔH = -849.5 KJ/mol

Explanation:

Data

ΔH = ?

H Fe2O3 = -825.5 KJ/mol

H Al2O3 = -1675 KJ/mol

H Al = 0 KJ/mol

H Fe = 0 KJ/ mol

Reaction

2Al(s) + Fe2O3(s) → 2Fe(s) + Al2O3(s)

ΔH = H products - H reactants

ΔH = H Al2O3 - H Fe2O3

ΔH = -1675 - (- 825.5)

ΔH = -1675 + 825.5

ΔH = -849.5 KJ/mol

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3 years ago

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