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lesya692 [45]
3 years ago
11

Platinum is a transition metal and forms Pt+2 and Pt+4 ions. Write the formulas for the compounds for each platinum ion with:

Chemistry
1 answer:
ehidna [41]3 years ago
3 0

Answer:

a

Explanation:

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How many moles of methane are in 20.32 x 10^16 molecules
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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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2 years ago
How many Valence electrons does Li have?
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It has a single valence electron.

3pro & 3ele - it is the single electron in shell 2.

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Internuclear distance can be defined as the distance between the nuclei atoms, i.e.,the distance between the center of nucleus to the outer most shell of an atom.
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