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soldier1979 [14.2K]
3 years ago
12

How many atoms are needed to react with 50 grams of O2 gas

Chemistry
1 answer:
natita [175]3 years ago
4 0

Answer:

3 moles

Explanation:

3 moles atoms are needed to react with 50 grams of O2 gas.

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gayaneshka [121]

I believe the answers are A and D

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3 years ago
Question 19 (3 points)
dalvyx [7]

Answer:

c ) 29.4 psi

Explanation:

If the density of earth was twice than its actual density which is 5.51 g/mL, then at sea level the atmospheric pressure of earth in British units would be equal to 29.4 psi because increase of gravity, increase occurs in the atmospheric pressure.  If we double the gravity of earth by double of the earth density, so the weight of that same mass of air will be double which leads to the doubling of the atmospheric pressure at the sea level.

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3 years ago
What is the word eletrovent
djyliett [7]

Answer:

Explanation:

Electrovalent is a word often associated with chemical bonding in the field of chemistry. It is special type of bond that occurs between metals and non-metals.

These bond types are interatomic interactions occurring between two atoms to ensure that they attain stable configurations.

  • This bond type is also known as ionic bonds.
  • It occurs between two species with a large electronegative diffference i.e one specie is electropositive and the other highly electronegative.
  • The more electropositive specie is metal and it readily loses its valence electrons.
  • The electronegative non-metal gains the electrons and becomes negatively charged.
  • The electrostatic attraction between the metal and non-metals yields the electrovalent bonds.
8 0
3 years ago
Draw and label the structure of a sodium atom showing the distribution of electrons​
Korolek [52]

Answer:

  • Please, find the drawing in the picture attached.

Explanation:

A simple model or drawing of the structure of an atom may be performed showing the electrons on the different energy levels (shells), plus the nucleons (protons and neutrons).

Then, you need the information on:

  • number of protons (atomic number)
  • electron configuration
  • number of neutrons

The first step is  to find the atomic number of the atom. You find that information in the periodic table, where the elements are show with their chemical symbol.

The chemical symbol of sodium is Na. It is located in the group (colum) 1 and period (raw) 3. There you find that the atomic number is 11. Hence your drawing must show 11 protons.

Since the atom is neutral, the number of electrons is also 11. So, you must place the electrons in the following energy levels or shells:

Main energy level      shell   number of electrons

n = 1                              K         2 (this is the maximum in this level)

n= 2                              L          8 (this is the maximun in this level)

n= 3                              M         1 (the maximum in this level is 18)

Now that you have the number of protons and the location of the electrons, you must determine the number of neutrons.

In the periodict table you will also find the atomic mass of the elements. The atomic mass of sodium is 22.990 amu. That means that most sodium atoms have mass number (number of protons plus neutrons) 23. Some isotopes will have less neutrons, but you can draw your model using the most typical isotope with 23 nucleons. This means, that the number of neutrons is 23 nucleons - 11 protons = 12 neutrons.

8 0
4 years ago
4. La siguiente ecuación balanceada muestra la preparación de Al2O3 (óxido de aluminio) calentando 225 g de óxido de cromo (II)
Schach [20]

Answer:

english

Explanation:

3 0
3 years ago
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