Determine the number of moles of MgCl2 in 13.4 g of MgCl2

To determine the number of moles of \( \text{MgCl}_2 \) in 13.4 g, follow these steps:

1. **Find the molar mass of \( \text{MgCl}_2 \):**
   - Atomic mass of Magnesium (Mg): 24.305 g/mol
   - Atomic mass of Chlorine (Cl): 35.453 g/mol
   - \( \text{MgCl}_2 \) contains 1 magnesium atom and 2 chlorine atoms.
   \[
   \text{Molar mass of MgCl}_2 = 24.305 + 2(35.453) = 95.211 \, \text{g/mol}
   \]

2. **Use the formula to calculate the number of moles:**
   \[
   \text{Moles of MgCl}_2 = \frac{\text{mass}}{\text{molar mass}} = \frac{13.4 \, \text{g}}{95.211 \, \text{g/mol}} \approx 0.141 \, \text{mol}
   \]

Thus, the number of moles of \( \text{MgCl}_2 \) in 13.4 g is approximately **0.141 moles**.

Would you like further details or have any questions?

Here are 5 related questions to explore:
1. How would you calculate moles if given the number of molecules instead of mass?
2. How is the concept of moles used in chemical reactions?
3. Can you find the number of atoms in 0.141 moles of \( \text{MgCl}_2 \)?
4. What is the mass of 0.5 moles of \( \text{MgCl}_2 \)?
5. How would the molar mass change if you had a compound like \( \text{MgBr}_2 \)?

**Tip:** Always ensure to use the correct atomic masses when calculating the molar mass of a compound.

Determine the number of moles of MgCl2 in 13.4 g of MgCl2.

Learn how to determine the number of moles in 13.4 g of MgCl2 by using molar mass and stoichiometric principles. This problem uses the formula moles = mass / molar mass, with the molar mass of MgCl2 calculated based on the atomic masses of magnesium and chlorine. Suitable for Grades 10-12.

Math Problem Statement

Solution

Ask a new question for Free

By Image

Math Problem Analysis

Mathematical Concepts

Formulas

Theorems

Suitable Grade Level

Related Recommendation