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bekas [8.4K]
3 years ago
9

What happens during covalent bonding? ​

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

Answer:

The atoms share some of their outer electrons so that each atom has a stable noble gas arrangement.

Explanation:

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A chunk of sulfur has a volume of 8.33 cm3. What is the mass of this sulfur? (Density of sulfur = 2.07 g/cm3.)
nata0808 [166]

Explanation:

equations to note:

density= mass/volume

mass= volume *density

volume= mass/density

you have a volume- 8.33cm3

you have a density- 2.07 g/cm3

Answer:

8.33cm3 * 2.07g/cm3=  17.24g

mass= 17.24g

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2 years ago
 Describe and name the parts of the atom.
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Answer:

The parts of an atom are<em><u> protons, electrons, and neutrons.</u></em>

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3 years ago
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How would you prepare 2.00 l of a 0.25 m acetate buffer at ph= 4.50 from concentrated acetic acid (17.4 m) and 1.00 m naoh? the
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The reaction of acetic acid with sodium hydroxide is:

CH_3COOH + NaOH    CH_3COONa + H_2O

The ratio of A-/HA is calculated as follows:

According to Henderson Hasslebach equation:


[A-]/[HA] = 10^p^H^-^p^K^_a

= 10^4^.^7^6^-^4^.^5^ = ^2^.^1^8

The total concentration of HA and A- = 2.0 L * 0.25 M = 0.5 mol.

[ A- ]+ [ HA ]= 0.5

[ A^- ] = 0.5 – [ HA]

[ HA] = 0.156 mol and [ A- ]= 0.343 mol

Total of 0.5 moles of acetic acid is required:

0.5 mol HA * 60.0 g

HA = 30.0 g acetic acid

Conversion of 0.343 moles of the acetic acid to acetate can be performed by adding NaOH

0.343 mol HA * (1 mol NaOH/1 mol HA) * (1000 mL/1 mol NaOH)

= 343 mL  

Thus, 343 mL of 1M NaOH is required

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3 years ago
When electrons move to a shell closer to the nucleus, energy is released as
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Answer:

it is released as lower energy

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3 years ago
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When working on a project, a scientist discovers that some of the data she was basing her research on was not accurate. In this
MrRa [10]
Stop her experiment and attempt to get accurate data before continuing from the start
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3 years ago
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