Respuesta :
Answer:
234 KJ ≡ 55.887 Kcal
Explanation:
∴ J ≡ Kg/m².s² ≡ N.m = 0.2389 cal
∴ cal = 4.187 J
⇒ 234 KJ * ( 1000 J / KJ ) * ( cal / 4.187 J ) * ( Kcal / 1000 cal ) = 55.887 Kcal
Answer : The correct number of significant figures in scientific notation is [tex]9.791\times 10^2\text{ kilocalorie}[/tex]
Explanation :
The conversion used from kilojoules (kJ) to kilocalories (kcal) is:
1 Joule = 4.184 Calorie
or,
1 kilojoule = 4.184 kilocalorie
As we are given that the energy 234 kJ. Now we have to convert it into kcal.
As, [tex]1\text{ kilojoule}=4.184\text{ kilocalorie}[/tex]
So, [tex]234\text{ kilojoule}=\frac{234\text{ kilojoule}}{1\text{ kilojoule}}\times 4.184\text{ kilocalorie}=9.791\times 10^2\text{ kilocalorie}[/tex]
Therefore, the correct number of significant figures in scientific notation is [tex]9.791\times 10^2\text{ kilocalorie}[/tex]
