21) T
22) F
23) F
24) T
25) T
26) F
27) F
28) I can’t see if it says increases or decreases, but the correct answer is increases.
29) T
30) F
31) T
32) F
33) F
34) F
35) T
36) T
37) F
When elements are heated/energized their electrons then absorb the energy and transition into a higher energy level known as the excited state. Then electrons then eventually fall back to their lowest state of energy or their ground state.
hope this helps :)p
<u>Answer:</u> The value of energy change is
<u>Explanation:</u>
To calculate the energy of one photon, we use Planck's equation, which is:
where,
h = Planck's constant =
c = speed of light =
= wavelength = 500 nm = (Conversion factor: )
Putting values in above equation, we get:
Hence, the value of energy change is
Answer:
12 L of O₂.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
CS₂ + 3O₂ —> CO₂ + 2SO₂
From the balanced equation above,
3 L of O₂ reacted to produce 1 L CO₂.
Finally, we shall determine the volume of O₂ needed to produce 4 L of CO₂. This can be obtained as follow:
From the balanced equation above,
3 L of O₂ reacted to produce 1 L CO₂.
Therefore, xL of O₂ will react to produce 1 L CO₂ i.e
xL of O₂ = 3 × 4
xL of O₂ = 12 L
Thus, 12 L of O₂ is needed for the reaction.