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gregori [183]
3 years ago
7

Which is an example of a chemical change?

Chemistry
2 answers:
asambeis [7]3 years ago
4 0

Answer:

Example: Burning wood

Souring milk

Mixing acid and base

Baking a cake

Explanation:

Chemical changes occur when a substance combines with another to form a new substance.

Example: Burning wood

Souring milk

Mixing acid and base

Baking a cake

FromTheMoon [43]3 years ago
3 0
Burning wood
dissolving salt in water
<span>mixing acid and base</span>
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If you had an object with a mass of 76g and a volume of 22 ml, what is its density? If you cut this object in half, what would b
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Mixtures of benzene and cyclohexane exhibit ideal behavior. A solution was created containing 1.5 moles of liquid benzene and 2.
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Answer:

Vapour pressure of cyclohexane at 50°C is 490torr

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Using Raoult's law, pressure of a solution is defined by the sum of the product sbetween mole fraction of both solvents and pressure of pure solvents.

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X_{cyclohexane}=\frac{2.5mol}{2.5mol+1.5mol} =0.625

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For the second equation:

X_{cyclohexane}=\frac{3.5mol}{3.5mol+1.5mol} =0.700

X_{benzene}=\frac{1.5mol}{3.5mol+1.5mol} =0.300

370torr = 0.700P^0_{A}+0.300P^0_{B}<em>(2)</em>

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340torr = 0.625P^0_{A}+0.375(1233.3-2.333P^0_{A})

340torr = 0.625P^0_{A}+462.5-0.875P^0_{A}

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P^0_{A} = 490 torr

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370torr = 0.700*490torr+0.300P^0_{B}

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