Question

What is the mass of 3.61 moles of $CaCl_2$? A) 3.61g B) 21.7g C) 21.7 x $10^{23}$ g D) 401g OA OB OC OD

          What is the mass of 3.61 moles of $CaCl_2$?
A) 3.61g
B) 21.7g
C) 21.7 x $10^{23}$ g
D) 401g
OA
OB
OC
OD

what is the mass of 361 moles of cacl2 a 361g b 217g c 217 x 1023 g d 401g oa ob oc od 22196

Added by Jason C.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Shalini Tyagi

11/22/2022

Step 1

61 moles of $CaCl_2$, we need to calculate the molar mass of $CaCl_2$. The molar mass of Ca is 40.08 g/mol. The molar mass of Cl is 35.45 g/mol. The molar mass of $CaCl_2$ is $40.08 + 2 \times 35.45 = 40.08 + 70.90 = 110.98$ g/mol. Show more…

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What is the mass of 3.61 moles of $CaCl_2$? A) 3.61g B) 21.7g C) 21.7 x $10^{23}$ g D) 401g OA OB OC OD

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Transcript

00:01 So we have five parts here.

00:03 So for the first part, so first of all, molar mass of calcium hydroxide c, a, o ,h, whole twice.

00:16 So that will be equal to atomic mass of calcium plus two multiplied by atomic mass of oxygen plus atomic mass of hydrogen.

00:24 So that is 40 plus 2 multiplied by 16 plus.

00:31 1.

00:32 So that is, so we will have 74 gram per mole.

00:40 Now we know that number of moles for any component.

00:49 So number of moles is the ratio of mass divided by molar mass.

01:03 So now we have to calculate mass here.

01:06 Number of moles is given molar mass we calculated.

01:08 So this will be.

01:10 Mass is equals to number of moles multiplied by molar mass.

01:15 So number of moles is 3 .367.

01:19 Multiplying molar mass is 74.

01:22 So multiplying them we will get 24 .9.

01:27 0 .15 gram.

01:32 So hence option d is correct.

01:44 Now moving on to next part.

01:54 So now according to mole concept, one mole of o2.

02:00 So that is equals to 32 gram.

02:03 So this is the mass of oxygen molecule for one mole...

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