A student sets up the following equation to convert a measurement. (The ? stands for a number the student is going to calculate.)

Fill in the missing part of this equation.

[tex]\[
\left(71 \, \frac{ J }{ mol }\right) \cdot \square = ? \, \frac{ kJ }{ mol }
\][/tex]



Answer :

To convert the given measurement from [tex]\(\frac{J}{mol}\)[/tex] to [tex]\(\frac{kJ}{mol}\)[/tex], follow these steps:

1. Identify the given value: We start with [tex]\(71 \frac{J}{mol}\)[/tex].

2. Understand the conversion between Joules and kiloJoules:
- [tex]\(1 \, kJ = 1000 \, J\)[/tex]
- Therefore, [tex]\(1 \, J = \frac{1}{1000} \, kJ\)[/tex]

3. Set up the conversion factor:
- To convert from Joules to kiloJoules, we multiply by [tex]\(\frac{1 \, kJ}{1000 \, J}\)[/tex].
- This conversion factor can be written as [tex]\(0.001 \frac{kJ}{J}\)[/tex].

4. Apply the conversion factor:
[tex]\[ \left( 71 \frac{J}{mol} \right) \cdot \left( 0.001 \frac{kJ}{J} \right) \][/tex]

5. Perform the multiplication:
[tex]\[ 71 \cdot 0.001 = 0.071 \][/tex]

Hence, the missing part of the equation is [tex]\(0.001\)[/tex]. The complete equation is:

[tex]\[ \left(71 \frac{J}{mol}\right) \cdot 0.001 = 0.071 \frac{kJ}{mol} \][/tex]

So, the final filled-in equation is:
[tex]\[ \left(71 \frac{J}{mol}\right) \cdot 0.001 = 0.071 \frac{kJ}{mol} \][/tex]