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Nimfa-mama [501]
3 years ago
7

As much as 25 percent of the fruits and vegetables grown in Chinese agricultural regions rot before they can be transported the

long distances to market. which of the following is a smaller, more manageable problem that contributes to this complex problem?
A. Conserving Earth's limited fossil fuel reserves
B. Reducing global emissions of greenhouse gases
C. Developing effective methods of food preservation
D. Preventing extinction of endangered species
Chemistry
1 answer:
gulaghasi [49]3 years ago
7 0

C. Developing effective methods of food preservation

Explanation:

The development of effective methods of food preservation is a much more smaller and manageable problem that contributes to the complex problem.

The percentage of food rotting is not as a result of lack of an effective preservation technique as highlighted in the passage. It is due to the long distances of agricultural area from where the farms are located.

  • To cut the loss, efficient and rapid transportation techniques needs to be put in place to carry the fruits and vegetables to the area where they are needed.
  • This is the most complex problem that if solved can peg back food rot.
  • Additional measures should be put in place to preserve the food.

Other options does not address the subject matter  

learn more:

Preservation brainly.com/question/4853419

#learnwithBrainly

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When 4.21 grams of potassium hydroxide are added to 250 mL of water in a coffee cup calorimeter, the temperature rises by 4.14°C
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Answer:

The molar heat of solution of potassium hydroxide = 57.7 kJ /mol

Explanation:

<u>Step 1:</u> Data given

Mass of potassium hydroxide = 4.21 grams

Volume of water = 250 mL

Temperature rise = 4.14 °C

Density = 1g/mL

Specific heat = 4.184 J/g°C

<u>Step 2:</u> Calculate the heat absorbed by water

q = m*c*ΔT

⇒ with m = the mass of water = 250 grams

⇒ with c= the specific heat of the solution = 4.184 J/g°C

⇒ with ΔT = 4.14 °C

q = 250 * 4.184*4.14 = 4330.4 J

<u>Step 3:</u> Calculate moles of KOH

Moles KOH = Mass KOH / Molar mass KOH

Moles KOH = 4.21 grams / 56.106 g/mol

Moles KOH = 0.075 moles

<u>Step 4:</u> Calculate molar heat of solution

4330.4 J / 0.075 moles = 57738.7 j/mol = 57.7 kJ /mol

(Note that the enthalpy change for the reaction is negative because the reaction is exothermic)

The molar heat of solution of potassium hydroxide = 57.7 kJ /mol

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