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g100num [7]
3 years ago
13

Examples for reversible change

Chemistry
2 answers:
castortr0y [4]3 years ago
6 0

Answer:

folding of paper

melting of ice

depletion of ozone

oxidation of blood

Explanation:

Rina8888 [55]3 years ago
4 0
Melting of ice
Sublimation
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What is the net amount of energy released when one mole of h2o(?) is produced?
german
The net amount of energy produced can be obtained from a table of enthalpy change of formation, available online.

The enthalpy change of formation indicate how much energy the 1 mole of the product (H2O) has relative to the elemental reactants (H2 and O2).  In other words, the "lost" energy equals the heat/energy released. 

For water (H2O), this value is -285.8 if the final product is a liquid under standard conditions, and -241.82 if the product is in gas form which contains some energy that could be further released.  This means that if the final product (H2O) is in liquid form, energy released is 285.8 kJ/mol.

Since water is in liquid form under standard conditions, the first value (285.8 kJ/mol) is generally appropriate.
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Is mixing sodium and water a physical or a chemical change
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Find the mass of 0.456 mol of Ca(OH)2 <br> Please if you can show the work.
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Ca(OH)2 molecular weight. Molar mass of Ca(OH)2 = 74.09268 g/mol. This compound is also known as Calcium Hydroxide. Convert grams Ca(OH)2 to moles or moles Ca(OH)2 to grams. Molecular weight calculation: 40.078 + (15.9994 + 1.00794)*2 ››

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What does a metal's position in an activity series indicate about the chemical properties of that particular metal?
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The closer to the top the metal is in the list, the more active the metal is and the stronger a reducing agent the metal is. When two different metals are involved in a redox reaction, the metal higher in the list will be oxidized and give up electrons that will reduce the cation of the less active metal.
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