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Aleonysh [2.5K]
3 years ago
7

how many moles of water are in 1.23 x 10^18 water molecules? I need the answer in scientific notation ?

Chemistry
1 answer:
Ann [662]3 years ago
8 0

Answer:

Moles=2.04×10^(-6)

Explanation:

No. Of moles=no. Of particles/ Avogadro's no

(Where no. Of particles may be atoms molecules or compounds)

Moles=1.23×10^18/6.022×10^23

Moles=0.204×10^(-5)

Moles=2.04×10^(-6)

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Explanation:

IHD = Index for Hydrogen Deficiency .It determines total number of unsaturation or Pi- bond present in the molecule.It is calculated using the formula:

For Molecule:

C_{c}H_{h}O_{o}N_{n}X_{x}

Here . C = carbon

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O = Oxygen

N = Nitrogen

X = Halogen

The IHD is calculated as :

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Here c = 4 , h = 8 , o = 2 .

n = x=0

Put the value in equation (1) and find IHD

\frac{2(4)-8-0+0+2}{2}

\frac{8-8+2}{2}

\frac{2}{2}

IHD = 1

For C4H9Cl

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IHD for this molecule can be calculated as :

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\frac{2(4)-9-1+2}{2}

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