Answer:
100 cal
Explanation:
Given data:
Mass of carbohydrate = 19 g
Mass of protein = 1 g
Mass of fats = 4 g
Solution:
The average calories content of
Protein 4 cal/g
Carbohydrate 4 cal/g
Fat 9 cal/g
Then,
1 g protein × 4 cal/g = 4 cal
4 g fat × 9 cal/g = 36 cal
19 g carb. × 4 cal/g = 76 cal
Total calories = 116 cal
Round to one significant figure = 100 cal
Answer:
Argon has 8 valence electrons making it non reactive.
Explanation:
Reactive chemicals are store in containers filled with Argon gas because the argon gas is non reactive. This is true because the argon gas has completely filled octet structure.
This can further be explained by writing the electronic configuration of argon.
The electronic configuration of argon is given below:
Ar (18) => 1s² 2s²2p⁶ 3s²3p⁶
Valence electron => 3s²3p⁶ = 2 + 6 = 8
From the above illustration, we can see that the outermost shell (i.e 3s²3p⁶) is having 8 electrons indicating that it is completely filled as the maximum number of electrons any shell can accommodate outside the first shell is 8 electrons. Thus, argon has 8 valence electrons ( i.e electrons in the outermost shell) and hence it is non reactive as the outermost shell is completely filled.
C ( Porcupines use there’s sharp quills to defend themselves from larger predators!)
