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Alex73 [517]
3 years ago
6

How many hydrogen atoms are in representative particle of each substance?Al(OH)3

Chemistry
1 answer:
Drupady [299]3 years ago
3 0

Answer:

  • <em>There are </em><u><em>3 </em></u><em>hydrogen atoms in the representative particle of Al(OH)₃</em>

Explanation:

  • Al(OH)₃ is the chemical formula for the r<em>epresentative particle of aluminum hydroxide</em>.

  • Since Al (aluminum) has not any subscript associated, it is understood that there is 1 atom of aluminum in each representative particle of Al(OH)₃.

  • Since the subscript 3 is after a parenthesis, it affects all the atoms that are inside such parenthesis. This leads to:

         - there are 3 atoms of oxygen in each representative particle of Al(OH)₃, and

         - there are 3 atoms of hydrogen in each representative particle of Al(OH)₃.

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27. The density of nickel is 8.91 g/cm3. How large a cube, in cm3, would contain 2.00 x 10^24 atoms of nickel? Use dimensional a
jok3333 [9.3K]

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Number of nickel atoms = 2\times 10^{24}

Molar mass of nickel = 58.7 g/mole

First we have to calculate the moles of nickel.

As, 6.022\times 10^{23} atoms form 1 mole of nickel

So, 2\times 10^{24} atoms form \frac{2\times 10^{24}}{6.022\times 10^{23}}=3.321 moles of nickel

The moles of nickel = 3.321 moles

Now we have to calculate the mass of nickel.

\text{ Mass of Ni}=\text{ Moles of Ni}\times \text{ Molar mass of Ni}

\text{ Mass of Ni}=(3.321moles)\times (58.7g/mole)=194.94g

The mass of nickel = 194.94 g

Now we have to calculate the volume of nickel.

Density=\frac{Mass}{Volume}

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Volume=21.88cm^3

Therefore, the volume of the cube is, 21.88cm^3

4 0
3 years ago
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Anit [1.1K]

Answer:

β-hydroxyaldehyde (an aldol) namely 3-Hydroxy butanal.

Explanation:

When acetaldehyde is treated with dil.NaOH it undergoes self condensation as it contains alpha-hydrogen atom in its compound forming β-hydroxyaldehyde (an aldol) namely 3-Hydroxy butanal. This compound upon further heating will eliminate a molecule of water forming aldol condensation product namely Crotonaldehyde Or But-2-en-al. see the diagram attached.

5 0
3 years ago
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