A 0.370-mol sample of a metal oxide(M2O3) weighs 55.4

Chapter 3, Problem 32P

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QUESTION:

A 0.370-mol sample of a metal oxide(\(\mathrm{M}_{2} \mathrm{O}_{3}\)) weighs 55.4 g.

(a) How many moles of O are in the sample?

(b) How many grams of M are in the sample?

(c) What element is represented by the symbol M?

Questions & Answers

QUESTION:

A 0.370-mol sample of a metal oxide(\(\mathrm{M}_{2} \mathrm{O}_{3}\)) weighs 55.4 g.

(a) How many moles of O are in the sample?

(b) How many grams of M are in the sample?

(c) What element is represented by the symbol M?

ANSWER:

Step 1 of 3

Here, we are calculating the each of the following.

a.)

Let’s calculate the moles of O  in  

Given

The number of Moles of  = 0.370 mol

From the given formula, In the sample have 2 moles of M and 3 moles of O.

0.370 mol  

 = 1.11 mol of O

Therefore, 1.11 mol of O are in the sample of .

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