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Alex17521 [72]
3 years ago
11

EXPERIMENT: DETERMINING VOLUME

Chemistry
1 answer:
Tanzania [10]3 years ago
7 0

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.

<u>(Ans- E)</u> <em>I learnt about determining volume of different objects from this investigation. </em>(Sorry, I know its not a very thoughtful answer)

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Since, we know the avagadro number is 6.02 x 10²³, we only have two unknown values left which are the molecular mass of CH3OH and its mole.

Molecular Mass: C = 12, H= 1, O = 16, since we have C=12, H4 = 4, O = 16, we will add them up: 12 + 4 + 16 =32

We know that one mole of anything = 6.02 x 10²³.
So we will use this formula to find the mole of methanol: Number of moles = Number of molecules / Avagadro number

Number of moles of CH3OH = (9.79 x 10^24)/6.02 x 10²³) =  16.263 moles.

Now we know that the molecular mass = 32 and the mole is = 16.263.

Now we can find its mass by using this formula: <span>Mass in grams = Number of moles x Molecular mass of 1 mole.
</span>
Mass in grams = 16.263 x 32 = 520g






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