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Ivanshal [37]
3 years ago
11

50 POINTS! ANSWER FAST!

Chemistry
2 answers:
borishaifa [10]3 years ago
7 0

Hello there! The calculations above are correct, however, the answer is: C.  The electron moved up to an energy level and has an energy of 10.92*10^-19 J

Korvikt [17]3 years ago
6 0

<u>Given:</u>

The initial energy of the electron Einitial = 16.32 * 10⁻¹⁹ J

The energy released i.e the change in energy ΔE = 5.4 * 10⁻¹⁹ J

<u>To determine:</u>

The final energy state Efinal of the electron

<u>Explanation:</u>

Since energy is being released, this suggests that Efinal < Einitial

i.e. ΔE = Einitial - Efinal

Efinal = Einitial - ΔE = (16.32 - 5.4)*10⁻¹⁹ = 10.92 * 10⁻¹⁹ J

Ans: A)

The electron moved down to an energy level and has an energy of 10.92 * 10⁻¹⁹ J

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Starting from a 1 M stock of NaCl, how will you make 50 ml of 0.15 M NaCl?
WARRIOR [948]

Answer:

We need 7.5 mL of the 1M stock of NaCl

Explanation:

Data given:

Stock = 1M this means 1 mol/ L

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We need 7.5 mL of the 1M stock of NaCl

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Tin has ten stable isotopes. The heaviest, 124Sn, makes up 5.80% of naturally occuring tin atoms. How many atoms of 124Sn are pr
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The average atomic mass of Sn is 118.71 g/mol

the percentage of heaviest Sn is 5.80%

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the mass of Sn^{124} will be = \frac{2.41X10^{22}X124}{6.023X10^{23}}=4.96g

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