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3 years ago

How much energy is required to change the temperature of 50g of water from 20 C to 55 C?

Chemistry

1 answer:

bagirrra123 [75]3 years ago

6 0

You beef go have this much energy 60g

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Help me, please. I Don't get my homework.

Lisa [10]

We’d have to be very careful because if we had our skeletons on the outside it’d be very easy to injure ourselves

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3 years ago

Read 2 more answers

What is the balanced chemical equation for the reaction of potassium with sulfur?

Aneli [31]

K + S = K2S

Potassium reacts with sulfur to produce potassium sulfide

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3 years ago

Pleaseee helppp!! Pleaseee

Aleks [24]

Answer:

10CO²+4H²O

Explanation:

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3 years ago

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

The hydrogen that has this configuration is the one that placed with the dashed bond (red hydrogen). 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!

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3 years ago

How was the Periodic Table of Elements developed and how are the elements arranged on it?

saw5 [17]

Answer:

Following are the solution to this question:

Explanation:

Mendeleev has been the chemist that designed a periodic table for component identification based on the increasing number of elements. Thus, the is traditionally called a table parent and this periodic table had some drawbacks.

Consequently, Mosley rebuilt Mendeleev's periodic table to once again overcome this disadvantage. Which atoms were arranged as per the increasing order of atomic number instead of mass number. The traditional table, therefore, comprises seven horizontal lines regarded as cycles. But 18 control limits were named group lines.

The whole Periodical Tables is classified as a,p,d, and f block

S block, groups have 1 and 2.

P block, group has 13-18

D block, group has 3 to 12

F block, – Two lines far below the periodic table.

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3 years ago