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ValentinkaMS [17]
3 years ago
10

What is the difference between physical and chemical change?

Chemistry
2 answers:
zmey [24]3 years ago
8 0
A physical Change is when you change the form, but not the object. such as when you grind wood, you get wood chips. same thing different form. a chemical Change is When You change the substance by adding another substance
Vikki [24]3 years ago
6 0
There are several differences between<span> a </span>physical and chemical change<span> in matter or substances. A </span>physical change<span> in a substance doesn't </span>change<span> what the substance is. In a </span>chemical change<span> where there is a </span>chemical<span> reaction, a new substance is formed and energy is either given off or absorbed.</span>
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Show the two (neutral) organic starting materials that would be used to synthesize the following ketone by a hydroxide mediated crossed‑aldol reaction the product formed is alpha-beta unsaturated carbonyl compound.

<h3>What is the Aldol-condensation ?</h3>

The condensation response among distinctive molecules of an aldehyde or ketone in a protic solvent which includes water or alcohol constitutes the crossed aldol response. When condensation is among distinctive carbonyl compounds, it's far referred to as crossed aldol condensation.

Applying the retrosynthetic evaluation technique, the systems of the beginning substances are decided via way of means of the usage of the bottom catalyzed for the crossed aldol mechanism. The beginning substances are aldehyde and ketone compounds that react with every different to present the goal molecule.

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How much energy is required to heat 250 grams of water from 20.0°C to 80.0°C? The heat capacity of water is 4.186 J/g°C
tatyana61 [14]

Answer:

62,790J

Explanation:

Q=mcT

= 250g*4.186J/gc*80-20

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I need help I need the answer ASAP.
kramer
The answer you selected in the picture is correct!
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