Answered

Westonci.ca is your go-to source for answers, with a community ready to provide accurate and timely information. Connect with a community of experts ready to help you find solutions to your questions quickly and accurately. Our platform offers a seamless experience for finding reliable answers from a network of knowledgeable professionals.

Determine the number of moles in 258.45 grams of iron (III) chloride (FeCl3). Show and explain all
your work for full credit. Make sure you show all units.

Sagot :

Sarah06109

Answer:

[tex]\boxed {\boxed {\sf 1.5935 \ mol \ FeCl_}}[/tex]

Explanation:

To convert from grams to moles, we must use the molar mass. This can be found on the Periodic Table. First, find the molar mass of iron and chlorine.

  • Fe: 55.84 g/mol
  • Cl: 35.45 g/mol

Check the formula. There is a subscript of 3 after Cl, so there are 3 atoms of chlorine in 1 molecule. Multiply iron's molar mass by 3, then add iron's molar mass.

  • FeCl₃: 55.84 + 3(35.45) = 55.84+106.35=162.19 g/mol

Use this number as a ratio.

[tex]\frac {162.19 \ g\ FeCl_3}{1 \ mol \ FeCl_3}[/tex]

Multiply by the given number of grams.

[tex]258.45 \ g \ FeCl_3 *\frac {162.19 \ g\ FeCl_3}{1 \ mol \ FeCl_3}[/tex]

Flip the ratio so the grams of iron (III) chloride cancel.

[tex]258.45 \ g \ FeCl_3 *\frac {1 \ mol \ FeCl_3}{162.19 \ g\ FeCl_3}[/tex]

[tex]258.45 *\frac {1 \ mol \ FeCl_3}{162.19}[/tex]

[tex]\frac {258.45 \ mol \ FeCl_3}{162.19}[/tex]

[tex]1.59350144892 \ mol \ FeCl_3[/tex]

The original measurement of grams has 5 significant figures, so our answer must have the same. For the number we calculated, that is the ten thousandth place.

[tex]1.5935 \ mol \ FeCl_3[/tex]

258.45 grams is approximately 1.5935 moles of iron (III) chloride.

We appreciate your visit. Hopefully, the answers you found were beneficial. Don't hesitate to come back for more information. Thanks for stopping by. We strive to provide the best answers for all your questions. See you again soon. We're glad you visited Westonci.ca. Return anytime for updated answers from our knowledgeable team.