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Ugo [173]
3 years ago
5

How many atoms are in this formula? O 2 1 2 3 4

Chemistry
1 answer:
zzz [600]3 years ago
7 0
2.

O indicates oxygen and the 2 indicates two atoms, so there are two oxygen atoms.
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Explanation:

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Density is the ratio of a sample's mass to its volume. A bar of lead has a mass of 115.2 g. When it is submerged in 25.0 mL of w
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Answer:

$10.97 \ g/cm^3$

Explanation:

Given :

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Difference in the water level = 35.5 - 25

                                               = 10.5 mL

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We know that when a body is submerged in water, it displaces its own volume of water.

Therefore, the volume of the lead bar = volume of the water displaced = 10.5 mL  = 10.5 \ cm^3

We know that mathematically, density is the ratio of mass of body to its volume.

Density of the lead bar is given by :

$\rho =\frac{\text{mass}}{\text{volume}}$

$\rho =\frac{\text{115.2 g}}{\text{10.5 cm}^3}$

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