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9966 [12]
3 years ago
12

Calculate the number of molecules in 64.5 grams of Nitrogen monoxide, NO

Chemistry
1 answer:
Alinara [238K]3 years ago
7 0

Answer:

N=9.933×10^23

Explanation:

n =  \frac{m}{mr}

N=n×la

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mel-nik [20]

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<span>In the physical change of matter, there is no new substance that is formed. It is only the appearance of the matter that is being changed and not its chemical composition. Cutting, tearing and grinding are only some of the examples that exhibit physical change. </span></span>

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EXPERIMENT: DETERMINING VOLUME
Tanzania [10]

Explanation:

(Ques- A) Why does the first method for determining volume work only for a regular-shaped object?

<u>(Ans- A)</u> <em>Because the method requires precise dimensions of objects for result, which is not possible for irregular shaped objects.</em>

(Ques - B) Will the second method for determining volume work for any object or just an odd-shaped one? Why?

<u>(Ans-B)</u> <em>It will work for both regular and irregular shaped objects since both displace equal volumes of water.</em>

(Ques - C) Is one method of measurement more accurate than the other? Why or why not?

<u>(Ans-C)</u> <em>Both are pretty accurate, with some experimental errors which may creep in accidentally. </em>

(Ques- D) Would the displacement method of measurement work for a cube of sugar? What about a cork? Why?

<u>(Ans - D)</u> <em>No, the method would not work because sugar being soluble, will dissolve in water. </em>

<em>No, the method would not work because sugar being soluble, will dissolve in water. Cork is less dense than water so floats on it, with only part of it submerged in water, resulting in displacement of less volume of water than actual volume of Cork.</em>

(Ques-E) What did you find out from this investigation? Be thoughtful in your answer.

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7 0
3 years ago
The formation of a gaseous product is usually indicated by a/an______________ in a chemical reaction.
Harman [31]

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--> Formation of a precipitate

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Some chemical reactions takes place with the evolution of gas. This can be seen in the reaction of Zinc metal with hydrochloric acid. Hydrogen gas is EVOLVED with the formation of zinc chloride.

UPWARD ARROW in a chemical reaction indicates the evolution of a gas. It appears only on the product side and is written next to the gaseous product.

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2 years ago
Which term is defined as the phase change from gas to liquid?.
skad [1K]
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If you think about the condensation you may find on your windows on a frosty morning, this may help you to remember :]
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