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3 years ago

Compare and contrast chemical change and physical change.

Chemistry

1 answer:

Nadusha1986 [10]3 years ago

8 0

Physical involves changes that you can observe and describe matters.

Chemical involves the chemical reaction.

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What is an orbital shell

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3 years ago

What mass of solid that has a molar mass of 46.0 g/mol should be added to 150.0 g of benzene to raise the boiling point of benze

enyata [817]

Answer : 17.12 g

Explanation: $\Delta T =k_b\times m$

$\Delta T$ = elevation in boiling point

$k_b$ = boiling point elevation constant

m= molality

$molality=\frac{mass of solute}{molecular mass of solute\times weight of the solvent in kg}$

given $\Delta T=6.28^{\circ}C$

Molar mass of solute = 46.0 $gmol^{-1}$

Weight of the solvent = 150.0 g = 0.15 kg

Putting in the values

$molality=\frac{x}{46gmol^{-1}\times0.15kg}$

$6.28 =2.53^{\circ}Ckgmol^{-1}\frac{x}{46gmol^{-1}\times 0.15kg}$

x = 17.12 g

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3 years ago

1.00176 x 103 Scientific notation

Ber [7]

Answer:

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Explanation:

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2 years ago

If two metals both have the same color, have similar densities, and are about the same size, but one is shiny and the other is d

Papessa [141]

If two metals both have the same color, have similar densities, and are about the same size, but one is shiny and the other is dull, they can be separated based on the lustrous physical property of a metal. Lustrous is the property of the metal to shine/gleam gently because of its particle arrangement of atoms.

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3 years ago

At which electrade in a voltaic cell does redaction always occar?

yanalaym [24]

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