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Evgen [1.6K]
3 years ago
5

Suggest 2 reasons why the noble gases become less ideal in their behaviour down the group from helium to xenon.

Chemistry
1 answer:
Elenna [48]3 years ago
4 0
Reason1: electrons on farther layers become free easyer
2nd reason: volume of atoms grows (from Helium to Xeon) so instead  of boyle-mariot law equation (PV=vRT) is  more accurate to use van der walls equations that adds to the boyle-mariot equation the volume occupied by the atoms of the gas to the volume of the space between the atoms P(Vm-b)=vRT
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What is the buffer component ratio, (bro-)/(hbro) of a bromate buffer that has a ph of 8.08. ka of hbro is 2.3 x 10-9?
Alla [95]

pKa= -log(ka)

= -log(2.3*10^-9)

= 8.64

Now pH can be calculated using equation:

pH=pka+log(BrO-)/(HBrO)

8.08 =8.64+log(BrO-)/(HBrO)

log(BrO-)/(HBrO)=8.08-8.64

= -0.56

(BrO-)/(HBrO)= 10^-0.56

=0.275

3 0
3 years ago
there are 3 isotopes of the element Gz: Gz-80,Gz-81,Gz-83. the average atomic mass of Gz is 82.74. what is the most abundant iso
Romashka-Z-Leto [24]

The most abundant isotope is Gz-83 because the average atomic mass of Gz is closer to 83.

The average atomic mass is defined as the weigthed mean of the isotopes.

The mass of the isotopes is 80, 81 and 83 uma, respectively.

As the average atomic mass (82.74uma) is closer to the atomic mass of Gz-83 than the mass of the other isotopes, you can interpretate that the most abundant isotope is Gz-83.

Learn more about average atomic mass in:

brainly.com/question/21536220

5 0
2 years ago
PLEASE HELP WILL GIVE BRAINLIEST
Gnom [1K]

Answer:

2. Option B.

Explanation:

H₂SO₄ + Ba(OH)₂ → BaSO₄ + 2H₂O

You can count 2H in sulfuric acid and 2 H in the barium hyrdoxide, so the coefficient for water must be 2.

You will have 4 H on both sides of the reaction.

Try with the dissociations of each reactant

Sulfuric acid ⇒ H₂SO₄ →  2H⁺  + SO₄⁻²

Barium hydroxide ⇒ Ba(OH)₂ → Ba²⁺  +  2OH⁻

Sulfate anion bonds to barium cation to produce the salt, therefore the 2 protons will bond the 2 hydroxide in order to produce, 2 moles of H₂O

2H⁺ + 2OH⁻ → 2H₂O

8 0
2 years ago
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What is a chemical substance that cannot be broken down into another chemical substance?
Dimas [21]

Molecule is a chemical substance that cannot be broken down into another chemical substance.

4 0
3 years ago
Which describes an covalent bond?
Ilya [14]

Answer:

is there choices you have to pick from

Explanation:

or do you have to describe a covalent bond ?

8 0
3 years ago
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