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2 years ago

I need help with 1-4 can someone help me?

Chemistry

1 answer:

Viktor [21]2 years ago

8 0

Explanation:

Density = mass/volume

1. Work out the density of ethanol and benzene

Ethanol - mass = 3.9 g and volume = 5 mL

Density = mass/volume =3.9/5=0.78g/mL

Benzene - mass=4.4g and volume = 5 mL

Density = mass/volume = 4.4/5=0.88g/mL

So Benzene is more dense

2. Density=mass/volume=25/7-2=5g/mL

The reason why the volume of the object is 7mL - 2mL is because the amount of displaced water is the volume of the object

3. For the Bohr Model, google the image of it.

Protons are positive charged

Neutrons are neutral

Electrons are negative charged

4. Main difference is the location of the electron in the atom.

Bohr Model : electrons orbits the nucleus in fixed paths

Electron cloud model: only the electron's probable location is determined

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8 months ago

a sample of 25.0g of an unknown metal is added to 25.0ml of water in a graduated cylinder and the final volume is 28.5ml what is

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Answer:

<h2>The answer is 7.14 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question

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It's density is

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2 years ago

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Answer:

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Explanation:

Grupo de la tabla periódica Electrones de valencia

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