Import Question JSON

Current Question (ID: 7337)

Question:

$\text{In sodium sulphate (}\text{Na}_2\text{SO}_4\text{), the mass percent of sodium, sulfur and oxygen is:}$

Options:

1. $32.4\%, 45.05\%, 22.6\%$
2. $22.6\%, 45.05\%, 32.4\%$
3. $32.4\%, 22.6\%, 45.05\%$
4. $45.05\%, 32.4\%, 22.6\%$

Solution:

\text{Hint: Mass percentage can be defined as the ratio of Mass of the component} \text{of the solution and total mass of the solution multiplied by 100%.} \text{Step 1: Find the molar mass of } \text{Na}_2\text{SO}_4 \text{The molecular formula of sodium sulfate is } \text{Na}_2\text{SO}_4. \text{Molar mass of } \text{Na}_2\text{SO}_4 = [(2 \times 23.0) + (32.066) + 4(16.00)] = 142.066 \text{ g} \text{Step 2: Write down the formula of mass %} \text{The mass percent of an element} = \frac{\text{Mass of the element in the compound}}{\text{Molar mass of the compound}} \times 100 \text{Step 3: Calculate mass % using the above formula.} \text{For Na: } \frac{46}{142.06} \times 100 = 32.4\% \text{For S: } \frac{32}{142.06} \times 100 = 22.6\% \text{For O: } \frac{64}{142.06} \times 100 = 45.0\%

Import JSON File

Upload a JSON file containing LaTeX/MathJax formatted question, options, and solution.

Expected JSON Format:

{
  "question": "The mass of carbon present in 0.5 mole of $\\mathrm{K}_4[\\mathrm{Fe(CN)}_6]$ is:",
  "options": [
    {
      "id": 1,
      "text": "1.8 g"
    },
    {
      "id": 2,
      "text": "18 g"
    },
    {
      "id": 3,
      "text": "3.6 g"
    },
    {
      "id": 4,
      "text": "36 g"
    }
  ],
  "solution": "\\begin{align}\n&\\text{Hint: Mole concept}\\\\\n&1 \\text{ mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6] = 6 \\text{ moles of carbon atom}\\\\\n&0.5 \\text{ mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6] = 6 \\times 0.5 \\text{ mol} = 3 \\text{ mol}\\\\\n&1 \\text{ mol of carbon} = 12 \\text{ g}\\\\\n&3 \\text{ mol carbon} = 12 \\times 3 = 36 \\text{ g}\\\\\n&\\text{Hence, 36 g mass of carbon present in 0.5 mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6].\n\\end{align}",
  "correct_answer": 4
}