In europe, nutritional information is given in kilojoules (kj) instead of nutritional calories (1 nutritional calorie = 1 kcal). a packet of soup has the following nutritional information:

250 ml of soup = 285 kj
how would that same packet be labeled in the united states if the information has to be given in nutritional calories per cup? (there are 4.18 joules in one calorie and 2 cups to a pint.)

The label would be:

64.56 kCal per cup.

Explanation:

Given that

250mL = 285kJ

We know that

473.18 kJ = 1 pint

therefore

250mL = pint

4.18 kJ = 1 kCal

the total cups in 250mL = 2X0.528 = 1.056

The energy in kCal = kCal

so in 1.056 cups there is 68.18 kCal of energy

Hence in one cup the energy =

So the label would be:

64.56 kCal per cup.

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a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.