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zaharov [31]
3 years ago
8

The hot dogs you ate at the barbecue last week were 75% fat-free by weight, had 275 calories, and weighed 110 g. a) What percent

age of these hot dogs are fat? b) How many grams of fat does each have? e) What is the percentage of Calories from fat? (Hint: Fat has approximately 9 Cal/g.)
Chemistry
1 answer:
vovangra [49]3 years ago
6 0

Answer:

a) 25%

b) 27.5 g

c) 90%

Explanation:

a) 75% fat-free by weight means 25% of the weight is made by fat.

b) 110 g ___ 100%

      x    ___ 25%

          x = 27.5g

Each hot dog has 27.5g of fat.

c) 9 cal ___ 1 g fat

      y    ___ 27.5 g fat

          y = 247.5 cal

275 cal ___ 100%

247.5 cal ___ z

     z = 90%

90 % of the calories come from fat.

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Answer:

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4 0
3 years ago
A chemist prepares hydrogen fluoride by means of the following reaction:
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Answer:

39.3%

Explanation:

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We must first determine the limiting reactant, the limiting reactant is the reactant that yields the least number of moles of products. The question explicitly says that H2SO4 is in excess so CaF2 is the limiting reactant hence:

For CaF2;

Number of moles reacted= mass/molar mass

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0.14 moles of calcium fluoride will yield 0.14×2= 0.28 moles of hydrogen fluoride

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Molar mass of hydrogen fluoride= 20.01 g/mol

Mass of HF= 0.28 moles × 20.01 g/mol= 5.6 g ( theoretical yield of HF)

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3 years ago
Calculate the magnitude and direction (i.e., the angle with respect to the positive H-axis, measured positive as counter-clockwi
r-ruslan [8.4K]

The graphics in the attachment is part of the question, which was incomplete.

Answer: Fr = 102N and angle of approximately 11°.

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Fr = \sqrt{10400}

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3 years ago
Will give brainliest, like, 5 stars and 5 points to best answer
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Diffusion is the movement of fluids or substances from regions of high concentration toward regions of lower concentration.

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