### Calculating the Number of Moles of Sodium Tungstate (Na2WO4)**Problem:**What is the number of moles in 4 g of Na₂WO₄, knowing that the molecular weight (M.wt) is 293.8?**Solution Options:**1. \( 6.8 \times 10^{-3} \)2. 0.0163. \( 0.68 \times 10^{-3} \)4. 0.0136**Step-by-Step Explanation:**To solve this, we use the formula for calculating moles from mass:\[ \text{Moles} = \frac{\text{Mass (g)}}{\text{Molecular Weight (g/mol)}} \]Given:- Mass = 4 g- Molecular Weight (M.wt) of Na₂WO₄ = 293.8 g/molSubstituting the values into the formula:\[ \text{Moles} = \frac{4 \text{ g}}{293.8 \text{ g/mol}} \]Calculating the value:\[ \text{Moles} = 0.0136 \]Thus, the correct answer is:- \( 0.0136 \)**Note:**There are no graphs or diagrams in this image. The question and multiple-choice answers are text-based.**Reminder to Students:**Always ensure you use the correct units and pay attention to significant figures in your final answer.

Given data: Grams of Na2WO4 = 4 g. The molecular weight of Na2WO4 = 293.8 g/mol. To calculate: The…

Answered: What is the No. of moles in 4 g of…

What is the No. of moles in 4 g of Na2WO4, knowing that the M.wt = * ,293.8 6.8 * 10^-3 O 0.016 O 0.68 * 10^-3 O 0.0136 O

Chemistry

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ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.

Question

### Calculating the Number of Moles of Sodium Tungstate (Na2WO4)

**Problem:**

What is the number of moles in 4 g of Na₂WO₄, knowing that the molecular weight (M.wt) is 293.8?

**Solution Options:**
1. \( 6.8 \times 10^{-3} \)
2. 0.016
3. \( 0.68 \times 10^{-3} \)
4. 0.0136

**Step-by-Step Explanation:**

To solve this, we use the formula for calculating moles from mass:
\[ \text{Moles} = \frac{\text{Mass (g)}}{\text{Molecular Weight (g/mol)}} \]

Given:
- Mass = 4 g
- Molecular Weight (M.wt) of Na₂WO₄ = 293.8 g/mol

Substituting the values into the formula:
\[ \text{Moles} = \frac{4 \text{ g}}{293.8 \text{ g/mol}} \]

Calculating the value:
\[ \text{Moles} = 0.0136 \]

Thus, the correct answer is:
- \( 0.0136 \)

**Note:**
There are no graphs or diagrams in this image. The question and multiple-choice answers are text-based.

**Reminder to Students:**
Always ensure you use the correct units and pay attention to significant figures in your final answer.

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