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Alborosie
3 years ago
12

Pure water has a pH of 7. Pure water _______.

Chemistry
1 answer:
raketka [301]3 years ago
8 0

Answer:

The concentration of Hydrogen Cation is:

Pure water is<u> NEUTRAL</u>

Explanation:

pH = It is negative logarithm of activity of Hydrogen ions.

pH = - log(a_{[H^{+}]})

Activity = concentration for dilute solutions

There are three types of solution based on pH:

1. Acidic solution : Those solution which have pH between 0 to 7 or less than 7 are acidic in nature . They turns blue litmus red.They contain more H+ ions than OH- ions

2. Basic : Those solution which have pH value greater that 7 of between 7 to 14 are basic in nature . They turn red litmus blue.They contain more OH- ions then H+ ions

3 . Neutral : Those solution which have pH = 7 are neutral . They are neither acidic nor basic in nature .They have equa;l concentration of H+ and OH- ions in the solution.

The given water has pH = 7 .This means it is neutral and has low H+ ion concentration  in solution. The H+ ion are :

10^{-7}M in  water.

OH- =

10^{-7}M in water

So overall neutral

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3 years ago
Lakesha gave three tenths of her cookies to Bailey and five tenths of her cookies to Helen. What fraction of her cookies did Lak
Mashutka [201]

Answer:

a . eight tenths of her cookies

Explanation:

Let the total number of Lakesha's cookies be represented by x.

So that;

She gave three tenths to Bailey = \frac{3}{10} of x

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She gave five tenths to Helen = \frac{5}{10} of x

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Fraction of Lakesha's cookies given away = \frac{3x}{10} + \frac{5x}{10}

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                                                      = \frac{8x}{10}

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2 years ago
Core electrons shield what from the pull of the nucleus?
nikklg [1K]

Answer:

C. Valence electrons

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Please mark my answer as brainliest, I would appreciate it.

:)

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3 years ago
Calculate the molecular mass or formula mass (in amu) of each of the following substances: (a) BrN3 amu (b) C2H6 amu (c) NF2 amu
irakobra [83]

Answer:

Shown below

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5 0
3 years ago
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According to the phase diagram for H₂O, what happens to the phases of
sergejj [24]

Answer:

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The question asks what happens at 0°C, as pressure is increased from 0atm to 10atm.

According to the question, the temperature is held constant.  The pressure changes.  In the phase diagram, we find the temperature 0°C on the horizontal axis, and all points where the temperature are 0°C are along that vertical line.

Since the pressure starts at 0atm and increases to 10atm, we start at the bottom, and move upward along that line, to see what phases of matter the substance changes to.

At the bottom, it is initially in a "gas" phase.  As it moves up, it transitions to a "solid" phase.  Later, as it continues moving up, it changes again into a "liquid" phase.

Thus, the answer would be "A", "water changes from a gas to a solid to a liquid", according to this phase diagram, at at 0°C, as pressure is increased from 0atm to 10atm.

8 0
1 year ago
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