Suppose that a person eats a diet of 2391 calories per day. a.) convert this energy into j. express your answer using four significant figures. b.) convert this energy into kj. express your answer using four significant figures. c.) convert this energy into kwh. express your answer using four significant figures.

Explanation:

(a)

The given data is:-

Energy = 2391 Calories

The conversion of calories to J is shown below as:-

1 calorie = 4.184 J

So,

Energy = 4.184 * 2391 J = 10003.944 J

Answer in four significant digits: -

(b)

The conversion of calories to kJ is shown below as:-

1 calorie = 0.004184 kJ

So,

Energy = 0.004184 * 2391 kJ = 10.003944 kJ

Answer in four significant digits: -

(c)

The conversion of calories to kWh is shown below as:-

1 calorie = kWh

So,

Energy = kWh = 0.002778873 kWh

Answer in four significant digits: -

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.

i'm pretty sure it is letter c.) car