A banana split contains 1.12 million calories. What is the energy value in kilojoules?

a. 1.12 kJ
b. 4.686 x 10^3 kJ
c. 4686 kJ
d. 2.68 x 10^5 kJ
e. 268 kJ

Option c. 4686 kJ

Actually b and c, are the same.

Explanation:

This question requires a conversion of units:

1.12 millon calories = 1.12×10⁶ cal

1 cal = 4.187 J → 1 cal = 4.18×10⁻³ kJ

To make the conversion = 1.12×10⁶ cal . 4.18×10⁻³ kJ / 1 cal =  4689.4 kJ

≅ 4686 kJ

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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the answer is 303.15 or 303