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aev [14]
1 year ago
14

How is a line spectra created from a hot gas? a. photons are emitted when the amount of radioactive material in the gas decrease

s by half. b. ionizing radiation knocks electrons out of an atom and they transform into photons. c. when electrons drop down from a high energy level they emit a photon. d. current flows through a filament and heats it up causing photons to be emitted.
Chemistry
1 answer:
fiasKO [112]1 year ago
4 0

Answer:

c when electrons drop down from a high energy level they emit a photon.

Explanation:

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How many molecules would be in 2.5 moles of H2O.show work
Fantom [35]

Answer:

1.5x 10^24

Explanation:

for every 1 mol there are 6.02 x 10^23 molecules

2.5 mol x 6.02 x 10^23

-----------------

1 mol

5 0
3 years ago
∆G° for the process benzene (l) benzene (g) is 3.7 Kj/mol at 60 °C , calculate the vapor pressure of benzene at 60 °C [R=0.0821
Alex787 [66]

Answer:

4) 0.26 atm

Explanation:

In the process:

Benzene(l) → Benzene(g)

ΔG° for this process is:

ΔG° = -RT ln Q

<em>Where Q = P(Benzene(g)) / P°benzene(l) P° = 1atm</em>

ΔG° = 3700J/mol = -8.314J/molK * (60°C + 273.15) ln P(benzene) / 1atm

1.336 = ln P(benzene) / 1atm

0.26atm = P(benzene)

Right answer is:

<h3>4) 0.26 atm </h3><h3 />
6 0
2 years ago
1. In an energy pyramid, which way does energy transfer?
natka813 [3]

It is B, From the bottom of the pyramid to the top

5 0
2 years ago
A ph of 2 indicates a
alekssr [168]
Nope mate I have no clue
5 0
3 years ago
How many molecular of H2O and O2 are present in 8.5g of H2O2 ?​
Mama L [17]

2H2O+O2--->2H2O2  

8.5 gm H2O2=0.25 mole  

hence H2O is also 0.25 mole i.e.4.5 gm  

O2is 0.125 mole i.e.4 gm

4 0
3 years ago
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