Answer:
The wavelength of he radiation emitted is
Explanation:
We know that energy needed is given by
----- (1)
h = 6.62 × J s
c = 3 ×
E = 786.4 - 310.8 = 475.6
Total energy
E = 78.9 × J
From equation (1)
×
Therefore the wavelength of he radiation emitted is
Answer:
Aluminum foil provides a complete barrier to light, oxygen, moisture and bacteria. For this reason, foil is used extensively in food and pharmaceutical packaging. Aluminum foil is also used to make aseptic packaging. This type of packaging enables storage of perishable goods without refrigeration.
Explanation:
The synthesis of a compound from its elements in their standard state, accompanied by a change in energy that is known as standard enthalpy of formation of a compound. The standard state of a substance is the most stable physical state of the compound that exist at STP that is at 1 atm, 273 K temperature. So the answer is yes, the energy change accompanying the synthesis of a compound from its elements in their standard state.
Explanation:
As per the measurements that are made by the student are as follows.
21.6 cm is equivalent to 8.5 inch
Therefore, 1 cm for the given situation will be equivalent to inch as follows.
1 cm = inch
= 0.393 inch
Hence, we will calculate the ratio of cm : inch as follows.
Ratio of cm : inch =
= 0.39
Thus, we can conclude that the ratio of cm/inch using the students data is 0.39.