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Vilka [71]
3 years ago
10

CO, CO2 law of multiple proportion

Chemistry
1 answer:
Georgia [21]3 years ago
7 0

Answer:

Co2 means carbon oxygen 2 (carbon dioxide and oxygen combined

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The ammonia molecule in the diagram has the observed bond orientation because ...
aivan3 [116]

Answer:

  • Nitrogen has four pairs of electrons: 3 bonds and 1 lone pair in the valence shell;
  • Electrons repel one another based on the VSEPR theory;
  • Nitrogen has a total of 7 protons (its atomic number is 7) in its nucleus.

Explanation:

The shape and the bond orientation of molecules and ions are both explained by the valences shell electron pair repulsion theory (VSEPR).

Ammonia, NH_3, is a molecule which contains three N-H bonds, as well as one lone pair on nitrogen. According to the VSEPR theory, molecules try to acquire a shape which would minimize the repulsion exhibited by the electron clouds present, that is, between the bonding (shared in a bond) and non-bonding (lone pair) electrons.

In VSEPR, our main step is to calculate the steric number, this is the sum of the number of bonds (ignoring the multiplicity of any bond) and the lone pairs on a central atom. In ammonia, we have 3 bonds and 1 lone pair, totaling to a steric number of 4. A steric number of 4 without any lone pairs on a central atom and just bonds would yield a tetrahedral shape with bond angles of 109.5^o.

Now, in this case, since we have a lone pair instead of a bond, it is repelling stronger decreasing the bond angles to about 107^o.

The greater the number of lone pairs, the lower the angle becomes.

To summarize:

  • Nitrogen has four pairs of electrons: 3 bonds and 1 lone pair in the valence shell;
  • Electrons repel one another based on the VSEPR theory;
  • Nitrogen has a total of 7 protons (its atomic number is 7) in its nucleus.
3 0
3 years ago
Is the dissolution of borax endothermic or exothermic.
Olin [163]

Answer: Endothermic.

Explanation: ...

8 0
2 years ago
Give the number of particles of each element in NH3, ammonia.
Y_Kistochka [10]
You'll need Avogadro's number for this. NH3 has 1 Nitrogen and 2 Hydrogen. You'll multiply the molar mass of each times Avogadro's number. So:

molar mass N x 6.022x10^23 x 1 Nitrogen= total A

Molar mass H x 6.022x10^23 x 2 Hydrogen= total B

Add total A+B = your answer

I don't have a calculator or periodic table but if you plug in the numbers you'll get your answer. Hope it helps.
3 0
3 years ago
What are the formulas for the following?<br> 1. Antimony (V) Hydroxide
sergejj [24]

Answer:

  • Antimony (V) Hydroxide molecular formula is H3O3Sb
  • Name is IUPAC that is computed by Lexi Chem
  • Molecular weight is 172.78 g/mol

Classification is in (PARENT NODE)

  • The chemical and the drug category
  • The inorganic chemicals
  • Metals
  • Metal, heavy
  • Antimony

3 0
3 years ago
The volume of a gas at 500K is 50.6L. Calculate the volume at 750K.
Andrew [12]

Answer:

75.9L

Explanation:

V1/T1=V2T2

V2=(V1*T2)/T1

V2= (50.6 L* 750K)/500K

V2=75.9L

5 0
3 years ago
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