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Arlecino [84]
2 years ago
9

Kernels of corn are heated and become popcorn. Why is this a chemical change?

Chemistry
2 answers:
goldfiish [28.3K]2 years ago
6 0

Answer:

When popcorn is popped, liquid inside the kernel is changed to steam. Pressure from the steam builds up inside the kernel. When the pressure reached a critical stage the kernel pops turning itself inside out. This is a physical change.

Explanation:

Dmitrij [34]2 years ago
6 0
Because it’s not a physical change
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With the help of word equations identify the products of heating candle wax?​
Y_Kistochka [10]

Explanation:

The word equation for the burning of a candle is wax plus oxygen yields carbon dioxide and water. This is an exothermic reaction that produces both light and heat.

The fuel for a burning candle is the wax. There are many different types of wax with a corresponding number of chemical formulas, but they are all hydrocarbons. Hydrocarbons are molecules made from hydrogen and carbon.

Burning the wax pulls the hydrogen and carbon in the wax apart and recombines them with oxygen from the atmosphere. This is an oxidation reaction. The resulting carbon dioxide and water are gases that disperse in the air.

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it is already balanced

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2 years ago
Describe how you would obtain a beaker of pure water from salty water
Maslowich

Answer:

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Explanation:

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The equilibrium constant (Kp) for the decomposition of phosphorus pentachloride (PCl5) to phosphorus trichloride (PCl3) and mole
Oksanka [162]

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Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as K_c

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Pressure at eqm.     0.973 atm                 0.548atm      x atm

The expression for equilibrium constant for this reaction will be,

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Now put all the given values in this expression, we get :

1.05=\frac{(0.548)\times (x)}{(0.973)}

By solving the term 'x', we get :

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Thus, the partial pressure of Cl_2 is 1.86 atm

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3 years ago
How many valence electrons does magnesium have
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Magnesium has just two valence electrons

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