Question

How many moles is 1.7 × 1023 atoms of Ne

Answer 1

Answer:

0.282 moles

Explanation

I assume you meant How many moles is 1.7 × 10^23 atoms of Ne?

1 mole is 6.02X10^23        .Avogados number=

(1.7X10^23)/(6.02X10^23)= 0.282 moles

Answer 2

Answer:

$\boxed {\boxed {\sf 0.28 \ mol \ Ne}}$

Explanation:

We are asked to find how many moles are in 1.7×10²³ atoms of Ne or neon.

Atoms are converted to moles 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. For this problem, the particles are atoms of neon.

We convert using dimensional analysis, so a conversion factor (using Avogadro's Number) must be set up.  

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

We are converting 1.7×10²³ atoms of Ne to moles, so we multiply the ratio by this value.

$1.7 \times 10^{23} \ atoms \ Ne *\frac {6.022 \times 10^{23} \ atoms \ Ne}{ 1 \ mol \ Ne}$

Flip the ratio so the units of atoms of neon cancel out.

$1.7 \times 10^{23} \ atoms \ Ne *\frac { 1 \ mol \ Ne}{6.022 \times 10^{23} \ atoms \ Ne}$

$1.7 \times 10^{23} *\frac { 1 \ mol \ Ne}{6.022 \times 10^{23} }$

$\frac { 1.7 \times 10^{23}}{6.022 \times 10^{23} } \ mol \ Ne$

Divide.

$0.2822982398 \ mol \ Ne$

The original measurement of atoms (1.7×10²³) has 2 significant figures (1 and 7). Our answer must also have 2 significant figures. For the number we found, that is the hundredth place.

The 2 in the thousandth place tells us to leave the 8 in the hundredth place.

$0.28 \ mol \ Ne$

1.7×10²³ atoms of Neon are equal to approximately 0.28 moles of neon.