What is the molarity of 200 mL of solution in which 2.0 moles of sodium bromide is dissolved?

Question

BlackTom AI · Accepted Answer

To determine molarity, we use the formula M = n / V, where n is the number of moles and V is the volume of solution in liters.
Option A: 2.0 M would correspond to n/V = 2.0, so for a given n = 2.0 moles the volume V would need to be 1.0 L (since 2.0 moles / 1.0 L = 2.0 M). However, the problem states the volume is 200 mL, which is 0.200 L, not 1.0 L, so this option does not match the given volume.
Option B: 10 M arises from n/V = 10. With n = 2.0 moles and V = 0.200 L, the calculation is 2.0 moles / 0.200 L = 10 M. This aligns with the provided data.
Option C: 0.40 M would mean V = n / M = 2.0 moles / 0.40 M = 5.0 L. This volume is much larger than the provided 0.200 L, so this option is inconsistent with the given conditions.
Option D: 4.0 M implies V = 2.0 moles / 4.0 M = 0.50 L. Again, this does not match the stated volume of 0.200 L, making this option incorrect for the problem as given.
In summary, each choice represents a different volume that would be required to achieve that molarity with 2.0 moles, and only one of them corresponds to the actual 0.200 L volume provided in the problem. The calculation that directly uses n = 2.0 moles and V = 0.200 L yields the corresponding molarity for the given conditions.

Chemistry (H) - Varnold - Preparatory Academy - 2nd Semester - 2024/2025 2025 States of Matter and Solutions Practice Test

What is the molarity of 200 mL of solution in which 2.0 moles of sodium bromide is dissolved?

View Explanation

Log in for full answers

Similar Questions

What mass of Li3PO4 is needed to prepare 0.500 L of a 0.400 M solution of Li3PO4? The molar mass of Li3PO4 is 115.8 g∙mol–1.

You need to prepare 500 mL of a 0.2 M sodium chloride (NaCl) solution. How many grams of NaCl do you need? (Molar mass of NaCl = 58.5 g/mol)

How many moles of HCl are there in 10 mL of a solution with a concentration of 0.5 mol/L?

How many moles of sodium chloride are there in 250 mL of a 1.20 M sodium chloride solution?

What is the molarity of a solution containing 56 grams of solute in 959 mL of solution? (molar mass of solute = 26 g/mol)

What is the molarity of 200 mL of solution in which 2.0 moles of sodium bromide is dissolved?

What is the molarity of a solution containing 7.0 moles of solute in 569 mL of solution?

What is the molarity of a solution containing 56 grams of solute in 959 mL of solution? (molar mass of solute = 26 g/mol)

More Practical Tools for International Students

Homework AI Solver

Stylized Writing Assistant

Plagiarism Checker Assistant

Citation Assistant

In-Class Translation Assistant

Class Notes Assistant

Quiz Search Assistant

Past Exam Questions by School

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler