The answer is; C
It begins with electrical energy when the microwave is connected to a power outlet. The electrical energy changes to electromagnetic energy as the microwave releases microwave radiation that hits the food in the microwave. When the microwave’s electromagnetic radiation hits the food, the water molecules in the food get excited and the food heats up turning to thermal energy.
An open system<span> is a system that has external interactions.</span>
Answer:- Molecular formula of the compound is .
Solution:- From given information:
C = 46.47%
H = 7.80%
Cl = 45.72%
First of all we find out the empirical formula from given percentages. We divide the given percentages by their respective atomic masses to calculate the moles:
= 3.87
= 7.72
= 1.29
Now, we divide the moles of each by the least one of them. Least one is Cl as it's moles are least as compared to the moles of C and H. So, let's divide the moles of each by 1.29.
= 3
= 6
= 1
So, the empirical formula of the compound is .
Empirical formula mass = 3(12.01) + 6(1.01) + 1(35.45)
= 36.03 + 6.06 + 35.45
= 77.54
To calculate the number of formula units we divide molar mass by empirical formula mass.
number of empirical formula units =
= 2
So, the molecular formula would be two times of empirical formula that is, .