Answer:
Predominantly ,the color is due to cation Ba2+.
Explanation:
Flame Test : The flame due barium cation is Green in color.
Anions such as Cl- and SO42- slightly (very little) affects the color . Hence ,
BaCl2 and BaSO4 gives Yellow -green flame not pure green
Ba 2+ cation gives green colour because:
It has loosely bounded outermost electron (low ionisation)
It absorb energy from the flame , get excited to higher energy state. When the excited electron comes back to ground state , it emits colour of particular frequency.
<span>a. 3.1 calories in heat were released by the burning candy bar sample
b. The energy value of the sample was 3.1 Cal/g
c.The total caloric content of the candy bar is 232.5 Calories, derived by multiplying the total mass of the candy bar by its fuel value per gram</span>
Answer:
The answer for the first problem is: C₆N₁H₁₁O₁ or C₆NH₁₁O
Explanation:
Nylon composition: Mass Divide by the atomic mass
Carbon 63.68 % 63.68 g 63.68/ 12 = 5.3
Nitrogen 12.38 % 12.38 g 12.38/14 = 0.88
Hydrogen 9.8% 9.8 g 9.8/1 = 9.8
Oxygen 14.14% 14.14 g 14.14/16 = 0.88
We choose the lowest number that is 0.88 for nitrogen and oxygen and divide the four results by this number
Carbon 5.3/0.88 = 6
Nitrogen 0.88/0.88 = 1
Hydrogen 9.8/0.88 = 11.1 = 11
Oxygen 0.88/ 0.88 = 1
Then the empirical formula has this coefficients
C₆N₁H₁₁O₁ or C₆NH₁₁O