Question

The energy content of 100 g of apple is about 59Cal. It can be represented in joules as - Your answer should have two significant figures.

Answer 1

The energy content of 100 g of apple with 59Cal is 250,000 J when converted to joules. This is obtained by multiplying the given calories by the conversion factor of 4184J/Cal and rounding to two significant figures.

Step-by-step explanation:

To convert the energy content of 100g of an apple from Calories to joules, we use the conversion factor where 1 food Calorie is equal to 4184 joules. Given that the apple has 59Cal (59 food Calories), we can calculate the energy content in joules by multiplying 59Cal by 4184J/Cal.

The calculation will be as follows:
Energy (J) = 59 Cal × 4184 J/Cal
Energy (J) = 247136 J
This result has more than two significant figures, so we round it to two significant figures to get: 250,000 J or 2.5 ×
`10^5` J.

Answer 2

The energy content of 100 g of apple, which is about 59Cal, can be converted to joules by using the conversion factor of 1 Cal = 4184 J. The conversion shows that 59Cal is equivalent to 246856 J, and rounded to two significant figures, this energy content is 250000 J.

Step-by-step explanation:

The energy content of 100 g of apple is about 59Cal, and this can be converted to joules using the standard conversion factor. We know that 1 Calorie (with a capital C) is equivalent to 1 kilocalorie (kcal) and that 1 kcal = 4184 joules. Therefore, to convert Calories to joules, we multiply the number of Calories by 4184 J/kcal.

So for 100 g of apple:

• 59 Cal × 4184 J/Cal = 246856 J

However, since we want to express this value to two significant figures, we would round the converted energy to 250000 J.