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2 years ago

An isotope of the element fluorine has 9 protons and 10 neutrons. What is the name of this isotope?fluorine

Chemistry

2 answers:

Mumz [18]2 years ago

8 0

Answer:

Fluorine

Explanation:

Data obtained from the question include:

The isotope of fluorine has:

Proton = 9

Neutron = 10

The atomic number is the proton number of the atom.

Therefore, the atomic number = 9

Mass number = proton + Neutron

Mass number = 9 + 10

Mass number = 19

Now comparing the above with the fluorine atom in the periodic table. We'll discover that the isotope is actually fluorine atom.

Therefore, the name of the isotope is fluorine

zloy xaker [14]2 years ago

7 0

Answer:

Explanation:

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In each row check off the boxes that apply to the highlighted reactant. reaction The highlighted reactant acts as a... (check al

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The given question is incomplete. The complete question is :

In each row check off the boxes that apply to the underlined reactant. The underlined reactant acts as a... (check all that apply)

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here underlined is $HCH_3CO_2$

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B. Brønsted-Lowry base

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D. Lewis base

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Here underlined is $NH_3$

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C. Lewis acid

D. Lewis base

3. $HNO_2(aq)+C_2H_5NH_2(aq)\rightarrow NO_2^-(aq) + C_2H_5NH_3^+(aq)$

Here underlined is $C_2H_5NH_2$

A. Brønsted-Lowry acid

B. Brønsted-Lowry base

C. Lewis acid

D. Lewis base

Answer: 1. Brønsted-Lowry acid

2. Lewis base

3. Brønsted-Lowry base

Explanation:

According to the Bronsted Lowry conjugate acid-base theory, an acid is defined as a substance which donates protons and a base is defined as a substance which accepts protons.

According to the Lewis concept, an acid is defined as a substance that accepts electron pairs and base is defined as a substance which donates electron pairs.

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As $HCH_3CO_2(aq)$ is donating a proton , it acts as a bronsted acid.

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As $NH_3$ contains a lone pair of electron on nitrogen , it can easily donate electrons to $BH_3$ and act as lewi base.

3. $HNO_2(aq)+C_2H_5NH_2(aq)\rightarrow NO_2^-(aq) + C_2H_5NH_3^+(aq)$

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2 years ago

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How many moles of methane are in 20.32 x 10^16 molecules

Marizza181 [45]

Taking into account the definition of avogadro's number, 3.37×10⁻⁷ moles of methane are 20.32×10¹⁶ molecules.

First of all, you have to know that Avogadro's number indicates the number of particles of a substance (usually atoms or molecules) that are in a mole.

Its value is 6.023×10²³ particles per mole and it applies to any substance.

Then you can apply the following rule of three: if 6.023×10²³ molecules are contained in 1 mole of methane, then 20.32×10¹⁶ molecules are contained in how many moles of methane?

amount of moles of methane= (20.32×10¹⁶ molecules × 1 mole)÷ 6.023×10²³ atoms

Solving:

<u><em>amount of moles of methane= 3.37×10⁻⁷ moles</em></u>

Finally, 3.37×10⁻⁷ moles of methane are 20.32×10¹⁶ molecules.

Learn more about Avogadro's Number:

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