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Vanyuwa [196]
3 years ago
9

Describe how a Newton's cradle illustrates the conservation of energy. A) Dropping the ball transfers the gravitational energy t

o the others causing the ball on the opposite side to swing up. B) Swinging the ball into the others, transforms the endothermic energy causing the ball on the opposite side to swing up. C) Impacting the ball into the others, fixes the exothermic energy to the balls causing the ball on the opposite side to swing up. D) As the ball drops and impacts the others, the energy is transferred through the balls causing the ball on the opposite side to swing up.
Chemistry
1 answer:
valina [46]3 years ago
6 0
I think it's D but im not 100% sure 
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When ethyl acetoacetate (CH3COCH2CO2CH2CH3) is treated with one equivalent of CH3MgBr, a gas is evolved from the reaction mixtur
grigory [225]

Answer:Methane gas is evolved from the reaction mixture.

Explanation:

When ethyl acetoacetate is treated with grignard reagent a carbanion is generated.

There are two acidic hydrogens which are present on the carbon which is in between the ester and the ketone group in ethylacetoacetate.

These two protons are also called active methylene protons and they are very acidic in nature due to the presence of two electron withdrawing substituents that is an ester and ketone.

CH₃MgBr is grignard reagent and it is an organo-metallic copmpound  . Carbon here in CH₃MgBr exists as carbanion  CH3⁻ which is basic enough to abstract the acidic protons present on ethylacetoacetate.

As CH3⁻ abstracts an acidic  proton from ethylacetoacetate it become CH₄ which is methane. As methane is a gas so it is methane gas which is evolved from the reaction mixture.

As  the acidic proton is abstracted from ethylacetoacetate which leads to generation of carbanion and this carbanion is very stable as it can be delocalized on to the two carbonyl groups . As we add aqueous acid to the reaction mixture the carbanion can again be protonated and its protonation would lead to the generation of ethylacetoacetate again.

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4 years ago
A 25 g substance has a temperature increase of 17’c when it absorbs 340 J of heat. What is it’s specific heat?
Irina-Kira [14]

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5 0
3 years ago
According to the equation for this chemical reaction, what does the 2 in front of 2Ag tell us?
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The number of molecules involved in the reaction, in this case, the number of Ag atoms involved.
3 0
4 years ago
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Does the density of an object depend on its size? Explain?.
evablogger [386]

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A piece of glass with a volume of 10 cm³ may have a mass of 27 g. Its density is  

<em>D</em> = <em>m</em>/<em>V</em> = 27 g/10 cm³ = 2.7 g/cm³

A piece of the same type of glass with a volume of 20 cm³ will have a mass

of 54 g. Its density is  

<em>D</em> = <em>m</em>/<em>V</em> = 54 g/20 cm³ = 2.7 g/cm³

Thus, density does not change with the size of an object. Density is an <em>intensive property</em>.

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Answer:

a

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magma is lava and lava is magma

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