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gladu [14]
3 years ago
5

The number of protons in a neutral atom is balanced by an equal number of

Chemistry
1 answer:
anastassius [24]3 years ago
3 0
There would be an equal amounts of ELECTRONS.

In order for the atom to be neutral it would imply that the number of protons (positive particles) and the number of electrons (negative particles) are equal since the neutrons are without charge.
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If the radius of copper is 0.128 nm, what is the pd of the (100) plane for copper in m-2?
kolbaska11 [484]

Copper has a FCC i.e. face centered cubic crystal structure. The 100 plane is essentially a planar section of the cubic cell where 4 Cu atoms occupy the 4 corners of the plane along with 1 Cu atom at the center of that plane. Each of the Cu atoms in the corners is shared by 4 adjacent unit cells. Thus, there are 2 Cu atoms present in the 100 plane (4*1/4 + 1 = 2).

Now, the planar density PD along the 100 plane is given as:

PD(100) = # atoms in the 100 plane/Area of 100 plane

            = \frac{2}{8R^{2} }

Here R = radius = 0.128 nm = 0.128*10^{-9} m

PD = \frac{2}{8*(0.128*10^{-9}) ^{2} } = 1.526*10^{19} m^{-2}

6 0
3 years ago
At the end of an experiment, the product is a mixture of the starting material, which is benzoic acid and the product, which is
Pani-rosa [81]

Answer:

b. Extraction with a solution of sodium hydrogen carbonate, separating the layers, followed by drying and evaporating the organic layer.

Step-by-step explanation:

The ether solution contains your product, benzaldehyde, and some starting material, benzoic acid, the purification steps are:

  1. Extract with a solution of NaHCO₃. The ether layer contains benzaldehyde, and the aqueous layer contains sodium benzoate.
  2. Separate the layers. Keep the ether layer.
  3. Dry the ether solution.
  4. Distill the ether (boiling point 35 °C) and purify the benzaldehyde (178 °C) by steam distillation.

a. is wrong. Extraction with HCl will not remove much of the benzoic acid.

c. is wrong. If you evaporate the organic layer, you will have a mixture of benzaldehyde and benzoic acid.

d. is wrong. If you work with the aqueous layer, you will end up with benzoic acid,

7 0
3 years ago
Give the full electron configuration for nitrogen.
garri49 [273]

Answer:

1s2 2s2 2p3

Explanation:

3 0
2 years ago
The ___ is the short form that chemists use to identify an element
bonufazy [111]

Answer:

Chemical Symbols

Explanation:

Im not positive on this one so dont rely on me lol

8 0
3 years ago
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3. Which of the following represents a covalent compound?
Ne4ueva [31]

Answer:

b. CO2

Explanation:

3 0
3 years ago
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