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zhannawk [14.2K]
3 years ago
15

The "clusters" of Democritus are like what kind of material that we know of today?

Chemistry
1 answer:
Vanyuwa [196]3 years ago
4 0
Compounds… Hope this helps :)
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How many Al atoms are there in 40.5 g of Al foil? Al:27
andrew-mc [135]

Answer:

c) 9.03 x 10^23

Explanation:

find the molar mass of Al

Al is 27.0 grams

Then use that, to find the number of moles in Aluminum.

Then use Avogadro's number which is 6.02 * 10^23

After that, write all of that down with dimensional analysis.

40.5 g * 1 mol/ 27.0 g of Al  * 6.02 x 10^23 / 1mol

As your final answer, you will get 9.03 * 10^23 atoms with sig figs.

Hope it helped!

4 0
3 years ago
How did the grandmother show her gratitude towards her granddaughter
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Answer:

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3 0
3 years ago
A solid ice cube absorbs 151.7 J of energy as it warms from 0.00°C to 4.70°C. What is the mass of the ice cube?
chubhunter [2.5K]
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5 0
3 years ago
When making an observation you should provide a general description of the subject rather than going into too much detail true o
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In an observation in an experiment, you want to write down as much detail as possible. So the answer would be false.
8 0
3 years ago
1. why is HCl not a good choice as the acid to catalyze a dehydration reaction?
Len [333]

Answer:

1) HCl contains the Cl^- which is a good nucleophile

2) 2-methyl-2- heptanol > 2-heptanol > 1-heptanol

3) see image attached

Explanation:

If the dehydration of alcohols is carried out using HCl, the chloride ion which is a good nucleophile will attack the substrate to yield an undesirable product.

The dehydration of alcohols is an E1 reaction. Recall that the ease of E1 reaction increases in the order 3°> 2°> 1°. Hence, 2-methyl-2- heptanol forms a tertiary carbocation intermediate during dehydration and has the greatest ease of dehydration.

The three products formed during the dehydration of 3,3-dimethyl-2-butanol are shown in the image attached. Two out of the three are formed by rearrangement reactions.

7 0
3 years ago
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