What three major chemical reactions drove the reduction of co2 in the atmosphere?
1 answer:
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Answer:
Explanation:
You will need to use the conversion between food calories, calories and joules.
From a nutritional table (from the internet) you can obtain the amount of nutritional calories for each type macronutrient:<em> carbohydrates, protein, and fat.</em>
Macronutrient food calories
Carbohydrate 4 cal/g
Protein 4 cal/g
Fat 9 cal/g
To convert food calories to regular calories, mutiply by the conversion factor:
Macronutrient calories
Carbohydrate 4,000 cal/g
Protein 4,000 cal/g
Fat 9,000 cal/g
To convert regular calories to joules, multiply by the conversion factor:
Macronutrient energy in joules
Carbohydrate 16,736 joule/g
Protein 16,736 joule/g
Fat 37,656 joule/g
Now you can multiply the grams of each macronutrient in one potato by its energy content:
Macronutrient energy/gram × grams = total energy
Carbohydrate 16,736 joule/g × 37 g = 619,232 joules
Protein 16,736 joule/g × 4.3 g = 71,968.8 joules
Fat 37,656 joule/g × 4 g = 150,624 joules
Total = 619,232 joules + 71,968.8 joules + 150,624 joules = 841,820.8 joules.
Since they are <u>two potatoes</u>, multiply by 2: × 841,820.8 joules = 1,683,641.6 joules.
Divide by 1,000 to convert to kilojoules = 1,683.64 kilojoules
Divide the total energy from the two potatoes by the <em>energy that an average person expend per hour of walking (845 kilojoules of energy per hour):</em>
Answer:
168°C is the melting point of your impure sample.
Explanation:
Melting point of pure camphor= T =179°C
Melting point of sample = = ?
Depression in freezing point =
Depression in freezing point is also given by formula:
= The freezing point depression constant
m = molality of the sample = 0.275 mol/kg
i = van't Hoff factor
We have: = 40°C kg/mol
i = 1 ( non electrolyte)
168°C is the melting point of your impure sample.