#1. The label of a lemon poppyseed bar lists the nutrition facts as5.0 g of fat, 25 g of carbohydrates and 9.0 g of protein.
Info: Caloric Values of Carb (4 kcal/g), fat (9 kcal/g) and protein(4kcal/g)...
total kilocalories= 180 kcal
Info #2: Energy Value of Lemon Bar in kJ:
760 kJ
Questions:
If you obtain 165 kJ, how many grams of the lemon poppyseed bar didyou eat?
If you are walking 840 kJ/h, how many minutes will you need to burnoff teh calories of two lemon bars?
In a box of nails, there are 75 iron nails weighing .280 lb. Thedensity of iron is 7,.86 g/cm^3. The specific heat of iron is .452J/g Cel.
Questions: If 30 nails are added to a graduated cylinder containing23.3 mL of water, what is the new level of water in tehcylinder?
How many joules must be added to the nails in the box to raise thetemperature from 12 to 129 Deg Celsius?
If al the iron nails at 55.0 C are added to the 321 g of water at4.0 C, what will be the final temperature C of the nails and water?
#1. The label of a lemon poppyseed bar lists the nutrition facts as5.0 g of fat, 25 g of carbohydrates and 9.0 g of protein.
Info: Caloric Values of Carb (4 kcal/g), fat (9 kcal/g) and protein(4kcal/g)...
total kilocalories= 180 kcal
Info #2: Energy Value of Lemon Bar in kJ:
760 kJ
Questions:
If you obtain 165 kJ, how many grams of the lemon poppyseed bar didyou eat?
If you are walking 840 kJ/h, how many minutes will you need to burnoff teh calories of two lemon bars?
In a box of nails, there are 75 iron nails weighing .280 lb. Thedensity of iron is 7,.86 g/cm^3. The specific heat of iron is .452J/g Cel.
Questions: If 30 nails are added to a graduated cylinder containing23.3 mL of water, what is the new level of water in tehcylinder?
How many joules must be added to the nails in the box to raise thetemperature from 12 to 129 Deg Celsius?
If al the iron nails at 55.0 C are added to the 321 g of water at4.0 C, what will be the final temperature C of the nails and water?
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Related questions
The label of a black cherry almond energy bar with a mass of 68 g lists the nutrition facts as 39 g of carbohydrate, 5 g of fat, and 10. g of protein. (2.5, 2.6, 3.4, 3.5)
Using the energy values for carbohydrates, fats, and proteins (see table below), what are the total kilocalories (Calories) listed for a black cherry almond bar? (Round off answers for each food type to the tens place.)
TABLE 3.7 Typical Energy Values for the Three Food Types | ||
Food Type | kcal/g | kJ/g |
Carbohydrate | 4 | 17 |
Fat | 9 | 38 |
Protein | 4 | 17 |
Express your answer with the appropriate units.
B: What are the kilojoules for the black cherry almond bar? (Round off answers for each food type to the tens place.)
C: If you obtain 160 kJ
, how many grams of the black cherry almond bar did you eat?
Express your answer to two significant figures and include the appropriate units.
D:I f you are walking and using energy at a rate of 840
kJ/h , how many minutes will you need to walk to expend the energy from two black cherry almond bars?
Express your answer to two significant figures and include the appropriate units.