QuestionJune 4, 2025

A chemical reaction requires 31.39 kJ. How many kilocalories does this correspond to? Multiple Choice 7,502 kcal 7.502 kcal 131.3 kcal 0.1313 kcal 31.39 kcal

A chemical reaction requires 31.39 kJ. How many kilocalories does this correspond to? Multiple Choice 7,502 kcal 7.502 kcal 131.3 kcal 0.1313 kcal 31.39 kcal
A chemical reaction requires 31.39 kJ. How many kilocalories does this correspond to? Multiple Choice 7,502 kcal 7.502 kcal 131.3 kcal 0.1313 kcal 31.39 kcal

Solution
4.6(217 votes)

Answer

7.502 kcal Explanation 1. Convert kJ to kcal Use the conversion factor **1 kcal = 4.184 kJ**. Divide 31.39 kJ by 4.184 kJ/kcal. \[ \text{kcal} = \frac{31.39 \, \text{kJ}}{4.184 \, \text{kJ/kcal}} \] 2. Calculate the result Perform the division to find the number of kilocalories. \[ \text{kcal} = 7.502 \, \text{kcal} \]

Explanation

1. Convert kJ to kcal<br /> Use the conversion factor **1 kcal = 4.184 kJ**. Divide 31.39 kJ by 4.184 kJ/kcal.<br /><br />\[<br />\text{kcal} = \frac{31.39 \, \text{kJ}}{4.184 \, \text{kJ/kcal}}<br />\]<br /><br />2. Calculate the result<br /> Perform the division to find the number of kilocalories.<br /><br />\[<br />\text{kcal} = 7.502 \, \text{kcal}<br />\]
Click to rate:

Similar Questions