1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Papessa [141]
2 years ago
10

Given the following equation: __ Al(s) __ O2(g) --> __ Al2O3(s) When the equation is correctly balanced using smallest whole

numbers, the coefficient of Al(s) is:
Chemistry
1 answer:
Reil [10]2 years ago
6 0

Answer:

The coefficient for Al(s) is 2.

Explanation:

__ Al(s) __ O2(g) --> __ Al2O3(s)

__ Al(s) __ O2(g) --> 1 Al2O3(s)

1 Al(s) __ O2(g) --> 1 Al2O3(s)

1 Al(s) + 1.5 O2(g) --> 1 Al2O3(s)             [Use a fraction to make it balance]

2 Al(s) + 3 O2(g) --> 2 Al2O3(s)             [Convert the 1.5 fraction to a whole number by multiplying all coefficients by 2]

You might be interested in
What did Bohr conclude about the atom after observing emission spectrum lines a. Electrons can exist in any energy state but hav
cupoosta [38]

Answer:

Option c: Possible electron energy states are quantized within an atom.

Explanation:

The Bohr's Model of the hydrogen atom consisted of the movements of the electrons around the positively-charged nucleus in circular orbits that have a certain energy state. The energy of that orbit is given by:  

E_{n} = - \frac{Rhc}{n^{2}}

<em>Where:</em>

E(n): is the energy of an electron in a particular orbit

R: is the Rydberg constant

h: is the Plank constant

c: is the speed of light

n: is a positive integer which corresponds to the number of the orbit

The ground state energy of a electron in the hydrogen atom is equal to -13,6 eV.

Bohr's Model aims to propose that the electron is restrictedly to occupy a certain region in the atom.    

Therefore, the conclusion of Bohr after observing emission spectrum lines is that "possible electron energy states are quantized within an atom", so the correct option is c.

I hope it helps you!

7 0
3 years ago
A chemical bond is formed between magnesium and chlorine. Describe the process and identify the nature of the chemical bond.
IRINA_888 [86]

Answer:

The answer to your question is: b

Explanation:

a. Magnesium shares an electron somewhat unevenly from its 3s orbital with the 3p orbital of chlorine producing a mildly polar covalent bond.  This option is wrong because Mg does not share electrons it loses electrons.

b. Magnesium loses and electron from the 3s and gives it up to the 3p of chlorine producing an ionic bond.  This option is correct, Mg loses one electron and Cl receives it, the bond formed between Mg and Cl is ionic.

c. Magnesium does not react chemically with chlorine because magnesium gives up electrons, but chlorine only shares electrons.  This answer is wrong, Mg and Cl react and produce MgCl₂.

d. Magnesium shares an electron from the 3s orbital with the 3p orbital of chlorine producing a covalent bond. Mg does not share electrons and is not able to produce covalent bonds.

7 0
3 years ago
What are “condensation nuclei”?
Kruka [31]

Answer:

Cloud condensation nuclei or CCNs are small particles typically 0.2 µm, or 1/100 the size of a cloud droplet on which water vapor condenses. Water requires a non-gaseous surface to make the transition from a vapour to a liquid; this process is called condensation.

4 0
2 years ago
Which properties determines the element that an atom Is?
balandron [24]

Answer:

The answer would be C. Number of protons in the atom.

Explanation:

On the periodic table, you see the element, with a big number at top, and a small number below the element name/abbreviation.

The big number is the amount of protons of the atom, which define each atom. The smaller number represents the atomic mass of the atom.

#teamtrees #WAP (Water And Plant)

4 0
2 years ago
What are 3 common uses for the Uranium Element?
ipn [44]
Uranium provides nuclear fuel used generate electricity in nuclear power station,also used by the military to power nuclear submarines and in nuclear weapons.
4 0
3 years ago
Other questions:
  • What are the examples of Alkaline Earth metals?
    13·1 answer
  • The following Lewis diagram represents the valence electron configuration of a main-group element. This element is in group 2A A
    13·1 answer
  • Which of the following are observations? The candle floats. The tires are flat. The dog is barking. The tire is flat because of
    7·2 answers
  • Which metal is liquid at room temperature <br> a) lead<br> b) copper<br> c) mercury<br> d) sodium
    5·2 answers
  • The sources of errors in the kinetic experiment are:
    10·1 answer
  • HELP ITS DUE TOMORROW ​
    7·2 answers
  • How does convection occur in the troposphere?
    8·2 answers
  • A substance that is made up of more than one kind of molecule is called a
    14·1 answer
  • A huge rock at the part gets really hot during the day because of what
    12·1 answer
  • How many elements are in this chemical formula? <br> 2(NH4)2SO4
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!