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3 years ago

14

Can I get some help please? It is asking me to click where the three circles intersect. When I do, It tells me that I’m wrong. 1

2 points for the best answer! (And Brainliest!)

1 answer:

Anit [1.1K]3 years ago

5 0

Answer:

Jefferson

Explanation:

they all come to that

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Which elements have isotopes with the same number of protons and neutrons

yan [13]

Answer:

Atoms of the same element, containing the same number of protons, but different numbers of neutrons, are known as isotopes. Isotopes of any given element all contain the same number of protons, so they have the same atomic number

Explanation:

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4 years ago

Unlike gases, the behavior of liquids and solids cannot be described by a set of laws that can be applied regardless of the iden

Tresset [83]

Answer:

a. True

Explanation:

The gases that we study are governed by different laws of physics. Gases behaves according to some given set of laws like the Universal gas laws, Boyles law, Charles law, Gay Lussac's law and many more.

But we do not see a definite pattern or rule when we study solids or liquids. The behavior of the solids and liquids are not described by the set of laws which are applied regardless of the identity of the substance.

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3 years ago

What is the result of multiplying 2.55 x 10^10 m x 3.5 x 10^-7m using proper significant figures and scientific notation.

BartSMP [9]

3 I think I’m sure much love

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3 years ago

11. if the ph of a solution increases from 2.0 to 4.0, the h3o^ ion concentration o a decreases by a factor of 2. b. decreases b

Wittaler [7]

Option (B) is the right answer.

Hydronium ion ( $H_{3}O^{+}$ ) concentration decreases by the <u>factor of 100</u>, if the pH of a solution increases from 2.0 to 4.0.

<h3>What is pH?</h3>

The hydrogen ion concentration in water is expressed by pH. Specific to aqueous solutions, pH is the <u>negative logarithm</u> of the hydrogen ion (H+) concentration (mol/L) : $pH = -log_{10}[H_{3}O^{+} ]$

Acidic solutions are those with a pH under 7, and basic solutions are those with a pH over 7. At this temperature, solutions with a pH of 7 are neutral (e.g.<u> pure water</u>). The pH neutrality <u>relies on temperature, falling below 7 if the temperature rises above 25 °C</u>.

<h3>Given: </h3>

pH1( initial pH) = 2.0

pH2( initial pH) = 4.0

[H3O+] = initial hydronium concentration

[H3O+]* = final hydronium concentration

<h3>Formula used : </h3>

$pH = -log_{10}[H_{3}O^{+}]$

<h3>Solution: </h3>

$pH = - log_{10}[H_{3}O^{+}] \\\\= > 10^{-pH} = [H_{3}O^{+}] \\\\similarly, \\\\10^{-pH} = [H_{3}O^{+}]*\\\\ = > 10^{-4} = [H_{3}O^{+}]*\\\\Now, \frac{[H_{3}O^{+}]*}{[H_{3}O^{+}]} = 10^{-2}$

Thus , the concentration of hydronium ion decreases by 100.

To learn more about pH :

brainly.com/question/15289741

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2 years ago

what would happen to the dissolved oxygen in the missouri river if large amounts of wasted were dumped into it

Leokris [45]

If large amounts of waste were dumped into the Missouri River, the dissolved oxygen levels would go down significantly and kill many of the organisms in the river.

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4 years ago