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Aloiza [94]
3 years ago
10

Can someone please check my answer?

Chemistry
1 answer:
Luden [163]3 years ago
4 0

Yes the ANSWER is Correct-

On first half life the mass will be 10 gram

On second half life the mass will be 5 gram

On third half life the mass will be 2.5 gram

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What is the formal charge on the xenon atom (xe) in xef2?
Likurg_2 [28]
F  is a    group  17   element  which  are  referred  to  as halogens.  hence  requires  one  electrons   to  obtain  octet    electron  configuration.Therefore F  has  -1  charge.  Xe  is  a  group  18  element  which  are  referred  to  as    noble  gas  which  has  octet  electron  configuration but due  to  the two  F-   Xe   has  +2   formal  charges.
5 0
4 years ago
Which element is more likely to dissociate into its monatomic form at 3000 K. H or N. Why?
Oliga [24]

Answer:

H2

Explanation:

In the first place it is necessary to consider that these two elements will be their diatomic form initially, that is, H2 and N2.

first we should check the equilibrium constant Kp tables in this case at a temperature of 3000K

Value for dissociation reaction of H2  in Kp = -3.685

Value for dissociation reaction of N2 in Kp = -22.359

Equilibrium constant for H2 dissociation is higher than N2 dissociation. so for this comparation H2 is more likely to dissociate.

8 0
3 years ago
What law states that the physical and chemical properties of the elements are periodic within the sequence of their atomic numbe
Soloha48 [4]

Answer:

Periodic Law.

Explanation:

The Periodic Law states that the physical and chemical properties of the elements repeat in a systematic and predictable way when the elements are arranged in order of increasing atomic number.

Many of the properties are repeated at intervals.

When the elements are arranged correctly, the trends in element properties become apparent and can be used to make predictions about unknown or unfamiliar elements, simply based on their placement on the table.

5 0
4 years ago
Read 2 more answers
Which of the following most accurately represents John Dalton's model of the atom
goblinko [34]
Dalton's atomic<span> theory proposed that all matter was composed of </span>atoms<span>, indivisible and indestructible building blocks. While all </span>atoms<span> of an element were identical, different elements had </span>atoms<span> of differing size and mass. Hope this answers the question. Have a nice day.</span>
8 0
3 years ago
PLSSSS HELP
Arlecino [84]

Answer:

carbon 7 hydrogen 8 nitrogen 4 oxegen 2

Explanation:

6 0
3 years ago
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