One slice of bread provides you with 50 nutritional calories of energy. If a 1-1b loaf of bread contains 18 slices, how many Joules of energy are obtained by eating 1.00 g of bread? (1 nutritional calorie equals 1 kcal

and 1 cal = 4.18 J)

Given :

Energy in one slice of bread , e = 50 kcal .

A 1- lb loaf of bread contains 18 slices .

1 cal = 4.18 J .

To Find :

How many Joules of energy are obtained by eating 1.00 g of bread .

Solution :

We know , 1 lb = 0.45 kg = 450 g .

So , mass of 1 slice bread in gram is :

So , 25 g bread contains 50 kcal of energy .

Energy in 1 g of bread is :

Therefore , energy in joules is .

Hence , this is the required solution .

solute : a solute is a substance that is dissolved in another substance is known as a solvent. it is mixed with a special mixture know as homogeneous mixture.

solvent: a solvent is a substance that dissolved a solute, which results in a solution is known as solvent.