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kati45 [8]
3 years ago
14

Metallic bonds are:

Chemistry
1 answer:
vlada-n [284]3 years ago
8 0

Answer:

D. bonds holding together two atoms of the same kind of metal.

Explanation:

Metallic bonds are very special kinds of interatomic forces that holds metals together and confers such unique properties on them.

The formation of this bond type is favored by large atomic radius, low ionization energy and a large number of electrons in the valence shell.

  • The metallic bond is usually an attraction between the positive nuclei of all the closely packed atoms in the lattice and electron cloud jointly formed by all the atoms by losing their outermost shell electrons.
  • This is as a result of low ionization energy.
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How did John dalton describe atoms?
mamaluj [8]

Answer:

John Dalton described the atoms based on there chemical and physical properties of which some were disproved later.

Explanation:

John Dalton described the atoms as

  1. Atoms are the smallest indivisible particles of matter.
  2. Atoms can neither be created nor destroyed.
  3. All atoms of the same element are identical by mass and size.
  4. Atoms of the different element have different mass and size.
  5. Atoms combined to form a compound and they do so in simply whole number ratio.
4 0
3 years ago
Suppose the formation of iodine proceeds by the following mechanism:
NARA [144]

Answer:

Overall reaction

H2(g) + 2ICI(g) -----> I2(g) +2HCl(g)

Overall Rate = k1[H2] [ICl]

Explanation:

Overall reaction

H2(g) + 2ICI(g) -----> I2(g) +2HCl(g)

The overall reaction is the sum of the two two reactions shown in the question. After the two reactions are summed up properly, this overall reaction equation his obtained.

Since K1<<K2 it means that step 1 is slower than step 2. Recall that the rate if reaction depends on the slowest step of the reaction. Hence

Overall Rate = k1[H2] [ICl]

3 0
3 years ago
A ___is used to measure air pressure.
Ostrovityanka [42]

Answer:

barometer

Explanation:

hopefully this helps

6 0
3 years ago
The reaction of sodium peroxide and water produces sodium hydroxide and oxygen gas. The following balanced chemical equation rep
a_sh-v [17]

Answer:

3.925 mol.

Explanation:

  • From the balanced equation:

<em>2 Na₂O₂(s) + 2 H₂O(l) → 4 NaOH(s) + O₂(g) ,</em>

It is clear that 2 moles of Na₂O₂ react with 2 moles of H₂O to produce 4 moles of NaOH and 1 mole of O₂ .

<em>Using cross multiplication:</em>

4 moles of NaOH produced with → 1 mole of O₂ .

15.7 moles of NaOH produced with → ??? mole of O₂ .

<em>∴ The no. of moles of O₂ made =</em> (1 mole)(15.7 mole)/(4 mole) =  <em>3.925 mol.</em>

8 0
4 years ago
Which acid is the best choice to create a buffer with ph= 3.19?
Crazy boy [7]
<span>The best choice is hypochlorous acid nitrous acid (HNO2) because it has the nearest value of pK to the desired pH.
pKa of </span>nitrous acid<span> is 3.34 
If we know pKa and pH values,  we can calculate the required ratio of conjugate base (NO2⁻) to acid (HNO2) from the following equation:
pH=pKa + log(conc. of base)/( conc. of acid)
</span><span>3.19=3.34 + log c(NO2⁻)/c(HNO2)
</span><span>3.19 - 3.34 = log c(NO2⁻)/c(HNO2)
-0.15 = log c(NO2⁻)/c(HNO2)
c(NO2⁻)/c(HNO2) = 10⁰¹⁵ = 1.41

</span>
5 0
4 years ago
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