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liraira [26]
2 years ago
10

How many atoms are in 6.3 mol Zn

Chemistry
2 answers:
san4es73 [151]2 years ago
4 0

Answer:

3.8x1024atoms Zn

Explanation:

is the answer

evablogger [386]2 years ago
4 0

Answer:

\boxed {\boxed {\sf 3.8 \times 10^{24} \ atoms \ Zn}}

Explanation:

We are asked to find how many atoms are in 6.3 moles of zinc (Zn). We will convert moles to atoms using Avogadro's Number or 6.022 × 10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance.

In this problem, the particles are atoms of zinc. Therefore, there are <u>6.022 ×10²³ atoms of zinc in 1 mole of zinc. </u>

We will convert using dimensional analysis, so set up a ratio using Avogadro's Number and the underlined information.

\frac {6.022 \times 10^{23} \ atoms \ Zn}{1 \ mol \ Zn}

We are converting 6.3 moles of zinc, so we multiply the ratio by this value.

6.3 \ mol \ Zn * \frac {6.022 \times 10^{23} \ atoms \ Zn}{1 \ mol \ Zn}

The units of moles of zinc cancel out.

6.3  * \frac {6.022 \times 10^{23} \ atoms \ Zn}{1 }

A fraction with a denominator of 1  is equal to the numerator. We can disregard the denominator of 1.

6.3 * 6.022 \times 10^{23} \ atoms \ Zn

3.79386 \times 10^{24} \ atoms \ Zn

The original measurement of moles has 2 significant figures, so our answer must have the same. For the number we calculated that is the tenths place. The 9 in the hundredth place tells us to round the 7 in the tenths place up to an 8.

3.8 \times 10^{24} \ atoms \ Zn

<u>6.3 moles of zinc contains approximately 3.8 ×10²⁴ atoms of zinc.</u>

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