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Snowcat [4.5K]
3 years ago
7

Which is a physical change?

Chemistry
1 answer:
kotykmax [81]3 years ago
3 0

Answer: Strawberries liquefied in a blender

Explanation:

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Identifying Isotopes
Otrada [13]

Answer:

<em>The parent isotope in the given elements is Radium 226. </em>

Explanation:

The two elements given in the question are radioactive elements radon and Helium which are formed after an Alpha decay happens in the radium 226 to form Radon 222.

Radon has many isotopes out of which here radon 222 is formed which is a noble gas that is odourless colourless but Radioactive.  Again in this reaction helium is formed which is again a noble gas and very light in weight.

5 0
3 years ago
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Give the structure of the product obtained when cyclopropene loses a proton. Will the product be aromatic or not?
astra-53 [7]

Answer:

not aromatic

Explanation:

Cyclopropene -

as the compound is is made to lose a proton , and gains a negative charge on its ring ,

Now, The ring can become aromatic or anti - aromatic depending on the number of π electrobns ,

According to Huckel 's rule ,

The cyclic compounds with ( 4n+2 ) π electrons , where , n = 0, 1, 2, 3 ... , are considered to be aromatic in nature ,

And the cyclic compounds with ( 4n ) π electrons , where , n = 1, 2, 3 ... , are considered to be anti - aromatic in nature.

Now, for the cyclopropene structure , the number of π electron are equal to 4 , 2 from the double bond and 2 from the negative charge .

Therefore , the compound becomes not aromatic or anti - aromatic .

3 0
3 years ago
Please help fast!!! What does the weight of an object depend on?
olga2289 [7]

weight depends on the force of gravity that is exerted on it.


3 0
3 years ago
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How do cardiorespiratory fitness and endurance differ from each other?
OleMash [197]

The difference in cardio-respiratory fitness and cardio-respiratory endurance is a very thin line. Cardio endurance the physical fitness of a person is measured.

It is termed as the ability of a person's body to send nutrients and oxygen continuously to all parts of the body when a physical activity (including lungs and heart) is done for a prolonged period of time. While cardio-respiratory fitness can be called as the fitness of the lungs and heart of a person's body.

8 0
3 years ago
2Al(s)+Fe2O3(s)−→−heatAl2O3(s)+2Fe(l) 2Al(s)+Fe2O3(s)→heatAl2O3(s)+2Fe(l) If 26.1 kg Al26.1 kg Al reacts with an excess of Fe2O3
Dmitry_Shevchenko [17]

Answer : The mass of Al_2O_3 produced will be, 49.32 Kg

Explanation : Given,

Mass of Al = 26.1 Kg  = 26100 g

Molar mass of Al = 26.98 g/mole

Molar mass of Al_2O_3 = 32 g/mole

First we have to calculate the moles of Al.

\text{Moles of }Al=\frac{\text{Mass of }Al}{\text{Molar mass of }Al}=\frac{26100g}{26.98g/mole}=967.38moles

Now we have to calculate the moles of Al_2O_3.

The balanced chemical reaction is,

2Al+Fe_2O_3\rightarrow Heat+Al_2O_3+2Fe

From the balanced reaction we conclude that

As, 2 moles of Al react to give 1 mole of Al_2O_3

So, 967.38 moles of Al react to give \frac{967.38}{2}=483.69 moles of Al_2O_3

Now we have to calculate the mass of Al_2O_3.

\text{Mass of }Al_2O_3=\text{Moles of }Al_2O_3\times \text{Molar mass of }Al_2O_3

\text{Mass of }Al_2O_3=(483.69mole)\times (101.96g/mole)=49317.0324g=49.32Kg

Therefore, the mass of Al_2O_3 produced will be, 49.32 Kg

3 0
3 years ago
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