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N76 [4]
3 years ago
9

Can someone help me with this please

Chemistry
2 answers:
dusya [7]3 years ago
6 0
Boiling water: It starts bubbling and it becomes hot
Baking Cake: The cake becomes soft and not liquid
Burning Wood: The wood burns and turns into ash
Painting Door: The color changes and the wood numbs slightly

Hope this helps!
STSN
GuDViN [60]3 years ago
4 0
Boiling water- bubbles, steam , temperature is hot/// Physical
Baking a cake- smell is changing, getting bigger in size/// Chemical
Burning wood- Change of color, fire, hot , smell is changing///Chemical
Painting a door- color is changing, Smell is changing/// Physical
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Calculate the number of atoms in 2 mol of sulfur dioxide (SO2).
Alex17521 [72]
Two moles of SO2 means 1.204x10^24 molecules, since there are 3 atoms in one molecule, multiply 1.204 x10^24 by 3 and you get 3.612x10^24.
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Which scientist was the first to use the telescope in astronomy? Copernicus Newton Kepler Galileo
coldgirl [10]

The scientist that was the first to use the telescope in astronomy was Newton

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The tosylate of (2R,3S)-3-phenylbutan-2-ol undergoes an E2 elimination on treatment with sodium ethoxide. Draw the structure of
andrezito [222]

Answer:

(R)-but-3-en-2-ylbenzene

Explanation:

In this reaction, we have a very <u>strong base</u> (<em>sodium ethoxide</em>). This base, will remove a hydrogen producing a double bond. We know that the reaction occurs through an <u>E2 mechanism</u>, therefore, the hydrogen that is removed must have an <u>angle of 180º</u> with respect to the leaving group (the "OH"). This is known as the <u>anti-periplanar configuration</u>.

The hydrogen that has this configuration is the one that placed with the <u>dashed bond</u> (<em>red hydrogen</em>). In such a way, that the base will remove this hydrogen, the "OH" will leave the molecule and a double bond will be formed between the methyl and the carbon that was previously attached to the "OH", producing the molecule (R) -but-3- en-2-ylbenzene.

See figure 1

I hope it helps!

6 0
3 years ago
(reply with the answer or get reported) Please help and thanks​
alexgriva [62]
1. C) 10
2. C) 2.33 mole
7 0
3 years ago
The density of aluminum is 2.7 g/ml what is the volume of 8.1 g
Nikolay [14]
D = m / V

2.7 = 8.1 / V

V = 8.1 / 2.7

V = 3.0 mL
8 0
3 years ago
Read 2 more answers
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