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
PSYCHO15rus [73]
3 years ago
5

OhDjdkdkdkdrkfkfkfkfkfkfkffififkfktkt

Chemistry
1 answer:
Sergio039 [100]3 years ago
8 0

Answer:

2 is the answer

Explanation:

Si: 1s2 2s2 2p6 3s2 3p2

Number of the unpaired electron will be 2

You might be interested in
Chemistry neeeeeeed help!
ryzh [129]
<h3> <u>ANSWER</u> </h3>

4. O²-

<h3><u>EXPLANATION</u> </h3>

O²- has 16 electrons while Ne has 18 electrons. O²- is a molecule that has one electron added to each atom, meaning that there are two extra electrons which makes O²- the same electron configuration as of Ne atom.

8 0
3 years ago
What is the binding energy of a mole of nuclei with a mass defect of 0.00084<br> kg/mol?
lana [24]

Answer:

7.56 x 10^13 J/mol

Explanation:

Binding energy = (Mass defect) × (velocity of light)² = (84 × 10^-5) × (3 × 10^8)^2 = 756 × 10^11 J = 7.56 × 10^13 J/mol

Hope this helps -Paige

7 0
3 years ago
How old was this tree when it was cut down?
son4ous [18]
Do you have more information than this
Is it a story?
5 0
3 years ago
Sulfur hexafluoride, a dense gas, is held in two separate containers in a storage room at an atmospheric pressure of 755 mmHg an
dimaraw [331]

Explanation:

As it is given that both the given containers are at same temperature and pressure, therefore they have the same density.

So, mass of SF_{6} in container- 1 is as follows.

    5.35 mol x molar mass of SF_{6}

            = 7.61 mol x 146.06 g/mol

             = 1111.52 g

Therefore, density of SF_{6} will be calculated as follows.

            Density = \frac{mass}{volume}  

         density = \frac{1111.52 g}{2.09 L \times 1000 ml/L}

                       = 0.532 g/mL

Now, mass of SF_{6} in container- 2 is calculated as follows.

        4.46 L x 1000 mL/L x 0.532 g/mL

            = 2372.72 g

Hence, calculate the moles of moles SF_{6} present in container 2 as follows.

  No. of moles = \frac{mass}{\text{molar mass}}  

                        = \frac{2372.72 g}{146.06 g/mol}

                        = 16.24 mol

Since, 1 mol SF_{6} contains 6 moles F atoms .

So, 16.24 mol  SF_{6} contains following number of atoms.

                = 16.24 mol \times 6

                = 97.46 mol

Thus, we can conclude that moles of F atoms in container 2 are 97.46 mol.

7 0
3 years ago
Which element often shares property's
tatuchka [14]
The answer is <span>C. those with the same color</span>
7 0
4 years ago
Other questions:
  • Which of these would help maintain homeostasis during exercise?
    12·2 answers
  • What is the function of a hypothesis in the scientific inquiry process?
    12·1 answer
  • For most atoms, a stable configuration of electrons is attained when the atom __________. hints hint 1. (click to open) for most
    6·1 answer
  • What type of cryptography uses two keys instead of just one, generating both a private and a public key?
    6·1 answer
  • 1. Using the Hoffman apparatus for electrolysis, a chemist decomposes 50.5 g of water into its gaseous elements. How many grams
    15·1 answer
  • Acids &amp; bases/concentration A mixture is made by mixing 425 mL of 0.94 M H2SO4 with 750. mL of 0.83 M NaOH. (a) What is the
    8·1 answer
  • I have 7 more questions left :’)
    14·2 answers
  • What is the wavelength of an X-ray that has a frequency of 7.8 x 1017 Hz
    8·1 answer
  • How many moles are in 4.35 X 1024 atoms of Iron (Fe)?
    7·1 answer
  • The further away from the sun a planet is, the hotter it is. <br><br> True<br> False
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!