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11Alexandr11 [23.1K]
3 years ago
7

Question 7

Chemistry
1 answer:
astraxan [27]3 years ago
8 0

Answer:

tama yon sagot nya gayahin mo nalang

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How does lanthanide contraction influence the density of period 6 transition element​
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Answer:

For example, the atomic radius of the metal zirconium, Zr, (a period-5 transition element) is 155 pm (empirical value) and that of hafnium, Hf, (the corresponding period-6 element) is 159 pm. ... The increase in mass and the unchanged radii lead to a steep increase in density from 6.51 to 13.35 g/cm3.

Explanation:

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A double replacement reaction is a reaction in which one element replaces a similar element within a compound. (2 points)
emmainna [20.7K]

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False

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youre welcome

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what charge does the proton give to the nucleus? a. positive b. negative c. positive or negative, depending on the number of ele
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Positive charge the proton give to the nucleus center of an atom 

7 0
3 years ago
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Which best represents a reaction mechanism?
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A + B = Products
This is the correct mechanism.
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How many protons are there in 20.02 mol of neon (Ne)?
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In order to determine the number of protons in 20.02 mol of Ne, we use Avogadro's number to convert the number of moles to number of atoms, 1 mol = 6.022 x 10^23 atoms. From there, we must know the number of protons in a Neon atom, which is 10. Thus, the formula will be:
(20.02 mol Ne)x(6.022 x 10^23 atoms/mol)x(10 protons/1 atom Ne) = 1.2056 x 10^26 protons 


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