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dangina [55]
3 years ago
9

The electronic configuration of an element is 1s2s22p6. How many valence electrons does it have?

Chemistry
1 answer:
Leto [7]3 years ago
7 0

Answer:

8

Explanation:

Inside this shell

In p orbital there r 6 electrons

And in s orbital thr is 2

Add them

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A typical aspirin tablet contains 327 mg of acetylsalicylic acid, HC9H7O4. Calculate the pH of a solution that is prepared by di
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Answer:

2.8

Explanation:

First, we will calculate the molarity of the acetylsalicylic acid solution.

M = mass of solute (g) / molar mass of solute × volume of solution (L)

M = 0.327 g / 180.158 g/mol × 0.237 L

M = 7.66 × 10⁻³ M

For a weak acid such as acetylsalicylic acid, we can find the concentration of H⁺ using the following expression.

[H⁺] = √(Ca × Ka)

where,

Ca: concentration of the acid

Ka: acid dissociation constant

[H⁺] = √(7.66 × 10⁻³ × 3.3 × 10⁻⁴)

[H⁺] = 1.6 × 10⁻³ M

The pH is:

pH = -log [H⁺]

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6 0
3 years ago
As part of an investigation, students combined substances in a beaker to observe
aleksklad [387]

Answer:

please mark brainlest and it's  Procedure 1: One of the products was a gas that escaped into the air.

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Explanation:

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When oil and water are mixed vigorously, the oil is broken up into tiny droplets that are dispersed throughout the water. this d
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Commercial grade fuming nitric acid contains about 90.0% HNO3 by mass with a density of 1.50 g/mL, calculate the molarity of the
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Answer:

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1.50 g/ml x 1000 ml = 1500 g/liter

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1350 g/liter x 1 mole/63 g = 21.43 moles/liter = 21 Molar HNO3

= 21 Molar of HNO3

8 0
3 years ago
Read 2 more answers
which Substance can be used to Neutralize nitric acid? A Acetic acid C Hydrogen peroxide b milk of magnesia D Ethanol​
sweet-ann [11.9K]

Answer:B

Explanation:

7 0
3 years ago
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