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Ber [7]
3 years ago
11

An atom requires 6.24 × 10−19J to remove its furthest electron in the gas phase. What is the maximum wavelength of electromagnet

ic radiation that will result in ionization? Report your numerical answer in units of nm. Use significant figures.
Chemistry
2 answers:
daser333 [38]3 years ago
3 0
<span>Report your numerical answer in units of nm. Use significant figur</span>
kondor19780726 [428]3 years ago
3 0
Solution:
1. Determine the frequency:

E=hv
6.24 x 10-19 J = (6.626 x 10-32 Js) x (v)
v = 9.417 x 10^14 s-1

2. Determine the wavelength:

<span>λv = c
</span><span>(λ) x (9.417 x 10^14 s-1) = 3.00 x 10^8 m/s
</span><span>λ = 3.18 x 10-7 m
</span>
Wavelength (<span>λ) = </span>318nm

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Can someone help me with this science study packet?
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7 0
3 years ago
Given the following cations, list them in the expected order from smallest to largest: Y3+, Nb3+, Sb3+
Ugo [173]

<u>Answer:</u> Antimony ion is the smallest and yttrium ion is the largest.

<u>Explanation:</u>

Atomic radius of an atom is defined as the total distance from the nucleus to the outermost shell of the atom.

An ion is formed when a neutral atom looses or gains electrons.

  • When an atom looses electrons, it results in the formation of positive ion known as cation.
  • When an atom gains electrons, it results in the formation of negative ion known as anion.

As moving from left to right in a period, more and more electrons get added up in the same shell and the attraction between the last electron and nucleus increases, which results in the shrinkage of size of an atom. Hence, the size of an atom decreases.

The size of the cation is small then their neutral atom because it has less number of electrons while its nuclear charge remains the same. Thus, the nucleus attracts the electron more towards itself and leads to the decrease in size.

We are given three cations:  Y^{3+},Nb^{3+}\text{ and }Sb^{3+}

Yttrium lies in Period 5, group 3 of the periodic table.

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Antimony lies in Period 5, group 15 of the periodic table.

So, the order of atomic radii in increasing order follows:

Sb^{3+}

Hence, antimony ion is the smallest and yttrium ion is the largest.

6 0
2 years ago
A chemist must prepare 575.mL of 1.00M aqueous sodium carbonate Na2CO3 working solution. He'll do this by pouring out some 1.58M
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Answer : The volume in mL of the sodium carbonate stock solution is 364 mL.

Explanation :

According to dilution law:

M_1V_1=M_2V_2

where,

M_1 = molarity of aqueous sodium carbonate

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V_2 = volume of aqueous sodium carbonate stock solution

Given:

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Now put all the given values in the above formula, we get:

1.00M\times 575mL=1.58M\times V_2

V_2=363.92mL\approx 364mL

Therefore, the volume in mL of the sodium carbonate stock solution is 364 mL.

8 0
2 years ago
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