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Stella [2.4K]
3 years ago
12

Can anyone help me please

Chemistry
2 answers:
JulijaS [17]3 years ago
5 0

Matter either loses or absorbs energy when it changes from one state to another.

antiseptic1488 [7]3 years ago
3 0

Answer: Matter either loses or absorbs energy when it changes from one state to another.

Explanation: "For example, when matter changes from a liquid to a solid, it loses energy. The opposite happens when matter changes from a solid to a liquid. ... The amount of energy in matter can be measured with a thermometer."

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Which is an example of a covalent bond? Chlorine accepts an electron from calcium to form a stable bond. Ions in a bar of pure i
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Do anyone know how to do question B
Over [174]

Answer:

a) IUPAC Names:

                   1) (<em>trans</em>)-but-2-ene

                   2) (<em>cis</em>)-but-2-ene

                   3) but-1-ene

b) Balance Equation:

                       C₄H₁₀O + H₃PO₄   →   C₄H₈ + H₂O + H₃PO₄

As H₃PO₄ is catalyst and remains unchanged so we can also write as,

                                    C₄H₁₀O   →   C₄H₈ + H₂O

c) Rule:

           When more than one alkene products are possible then the one thermodynamically stable is favored. Thermodynamically more substituted alkenes are stable. Furthermore, trans alkenes are more stable than cis alkenes. Hence, in our case the major product is trans alkene followed by cis. The minor alkene is the 1-butene as it is less substituted.

d) C is not Geometrical Isomer:

        For any alkene to demonstrate geometrical isomerism it is important that there must be two different geminal substituents attached to both carbon atoms. In 1-butene one carbon has same geminal substituents (i.e H atoms). Hence, it can not give geometrical isomers.

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2 years ago
According to the graph, how much Potassium bromide can be dissolved in 100 g of warer at 40C?
xenn [34]
At 40 degrees Celsius, approximately 78 grams of potassium bromide can be dissolved.
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3 years ago
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