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2 years ago

10

How do I identify significant figures in chemistry?

1 answer:

Komok [63]2 years ago

3 0

1) START counting for sig. figs. On the FIRST non-zero digit.

2) STOP counting for sig. figs. On the LAST non-zero digit.

3) Non-zero digits are ALWAYS significant.

4) Zeroes in between two non-zero digits are significant. All other zeroes are insignificant.

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You can obtain a rough estimate of the size of a molecule with the following simple experiment: Let a droplet of oil spread out

mina [271]

Answer:

The diameter of the oil molecule is $4.4674\times 10^{-8} cm$ .

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Density of the oil drop = $d=918 kg/m^3$

Volume of the oil drop: v

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$v=\frac{m}{d}=\frac{9.00\times 10^{-7} kg}{918 kg/m^3}$

Thickness of the oil drop is 1 molecule thick.So, let the thickness of the drop or diameter of the molecule be x.

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$a=4\times 3.14\times (0.418 m)^2=2.1945 m^2$

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$\frac{9.00\times 10^{-7} kg}{918 kg/m^3}=2.1945 m^2\times x$

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The thickness of the oil drop is $4.4674\times 10^{-8} cm$ and so is the diameter of the molecule.

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2 years ago

If a gas at 25.0 °C occupies 3.60 liters at a pressure of 1.00 atm, what will be its

yKpoI14uk [10]

Answer:

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