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4 years ago

How many moles of ions are in 1.25mol of K2SO4 ?

1 answer:

8 0

K2 SO4 = 2[K+] + [SO4 2-]

Which means that every mol of K2SO4 gives 3 moles of ions.

Then 1.25 mol of K2SO4 gives 3*1.25 = 3.75 moles of ions.

Answer: 3.75

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Licemer1 [7]

Explanation:

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3 years ago

A serving of soup contains 5.0 g of fat, 20.0 g of carbohydrates, and 3.0 g of protein. Determine how many kilocalories (kcal) a

marta [7]

Answer: The amount of kilocalories contained in the given serving of soup is 0.137 kCal

Explanation:

As per the USDA:

Carbohydrates provide 4 calories per gram, protein provides 4 calories per gram, and fat provides 9 calories per gram.

We are given

Mass of fat in the soup serving = 5.0 g

Mass of carbohydrates in the soup serving = 20.0 g

Mass of protein in the soup serving = 3.0 g

Conversion factor used: 1 kCal = 1000 Cal

Applying unitary method:

For Fat:

1 gram of fat provides 9 calories

So, 5.0 gram of fat will provide = $\frac{9}{1}\times 5.0=45Cal=0.045kCal$

For Carbohydrates:

1 gram of carbohydrates provides 4 calories

So, 20.0 gram of carbohydrates will provide = $\frac{4}{1}\times 20.0=80Cal=0.080kCal$

For Proteins:

1 gram of proteins provides 4 calories

So, 3.0 gram of fat will provide = $\frac{4}{1}\times 3=12Cal=0.012kCal$

Total kilocalories per serving = [0.045 + 0.080 + 0.012] kCal = 0.137 kCal

Hence, the amount of kilocalories contained in the given serving of soup is 0.137 kCal

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3 years ago

Need Help On This...Thanks

ollegr [7]

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17) Insulators, most non metallic materials (Ex. cloth, or rubber, plastic)

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3 years ago

Which of the following was NOT suggested by Rutherford’s gold foil experiment?

Phoenix [80]

Answer: The Answer is C.

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3 years ago

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dolphi86 [110]

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3 years ago