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Bingel [31]
3 years ago
8

An example of binary compound is

Chemistry
2 answers:
IrinaVladis [17]3 years ago
8 0

Answer:

https://sciencenotes.org/what-is-a-binary-compound-definition-and-examples/

Explanation:

https://sciencenotes.org/what-is-a-binary-compound-definition-and-examples/

Dima020 [189]3 years ago
4 0

Answer:

Explanation:

An example of binary compund is ZnI2 is zinc iodide

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A party balloon contains 5.50 x 10 ^22 atoms of helium gas. What is the mass, in grams of the
eduard

Answer:

\boxed {\boxed {\sf A. \ 0.365 \ g\ He}}

Explanation:

<u>1. Convert Atoms to Moles</u>

We must use Avogadro's Number: 6.022*10²³. This is the number of particles (atoms, molecules, ions, etc.) in 1 mole of a substance. In this case, the particles are atoms of helium. We can create a ratio.

\frac {6.022*10^{23} \ atoms \ He}{1 \ mol \ He}

Multiply by the given number of helium atoms.

5.50 *10^{22} \ atoms \ He *\frac {6.022*10^{23} \ atoms \ He}{1 \ mol \ He}

Flip the fraction so the atoms of helium cancel.

5.50 *10^{22} \ atoms \ He *\frac {1 \ mol \ He}{6.022*10^{23} \ atoms \ He}

5.50 *10^{22} *\frac {1 \ mol \ He}{6.022*10^{23} }

\frac {5.50 *10^{22} \ mol \ He}{6.022*10^{23} }= 0.09133178346 \ mol \ He

<u>2. Convert Moles to Grams</u>

We must use the molar mass, which is found on the Periodic Table.

  • Helium (He): 4.00 g/mol

Use this as a ratio.

\frac { 4.00 \ g \ He }{ 1 \ mol \ He}

Multiply by the number of moles we calculated. The moles will then cancel.

0.09133178346 \ mol \ He *\frac { 4.00 \ g \ He }{ 1 \ mol \ He}

0.09133178346*\frac { 4.00 \ g \ He }{ 1 }

0.3653271338 \ g\ He

<u>3. Round </u>

The original measurement has 3 significant figures (5, 5, and 0). Our answer must have the same. For the number we calculated, it is thousandth place. The 3 in the ten thousandth place tells us to leave the 5.

0.365 \ g\ He

The mass is <u>0.365 grams of helium</u> so choice A is correct.

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Which one of the samples contains the most molecules?
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Explanation: One mole contains 6.0225 ·10^23 molecules

Despite of the substance

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the melting process begins right away because the air temperature around the ice cubes is warmer than the temperature in the freezer

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