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
sweet-ann [11.9K]
3 years ago
7

1, 2, or 3...help please

Chemistry
2 answers:
Mashcka [7]3 years ago
7 0

Answer:

molecular so number 3. ...

e-lub [12.9K]3 years ago
4 0
Number 3 I hope this helps
You might be interested in
1. A charged group of covalently bonded atoms is known as
katrin2010 [14]
Its known as covalently bonded atoms
7 0
3 years ago
What is the wavelength of radiation emitted when an electron goes from the n = 7 to the n = 4 level of the Bohr hydrogen atom? G
Phantasy [73]

Answer:

the wavelength of radiation emitted  is \mathbf{\lambda= 2169.62 \ nm}

Explanation:

The energy of the Bohr's hydrogen atom can be expressed with the formula:

\mathtt{E_n =- \dfrac{13.6\ ev}{n^2}}

For n = 7:

\mathtt{E_7 =- \dfrac{13.6\ ev}{7^2}}

\mathtt{E_7 =-0.27755 \ eV}

For n = 4

\mathtt{E_4=- \dfrac{13.6\ ev}{4^2}}

\mathtt{E_4 =- 0.85\ eV}

The  electron goes from the n = 7 to the n = 4, then :

\mathtt{E_7-E_4 = (-0.27755 - (-0.85) ) \ eV}

\mathtt{= 0.57245\ eV}

Wavelength of the radiation emitted:

\mathtt{\lambda= \dfrac{hc}{0.57245 \ eV}}

where;

hc  = 1242 eV.nm

\mathtt{\lambda= \dfrac{1242 \ eV.nm }{0.57245 \ eV}}

\mathbf{\lambda= 2169.62 \ nm}

4 0
3 years ago
Name the following molecule in the image
Vesna [10]

\\ \sf{:}\longrightarrow 2,4-diethyl-2-methylpentane

4 0
2 years ago
How can you tell which ionic compounds will react in an aqueous solution
Darina [25.2K]
1.  Determine if the ionic substances can break apart into ions.
 - e.g. CaCO3 isn't very soluble, do it can't dissolve and dissociate.  If it can't pop apart, no ions.
2.  Swap the partners for all the other ions that you can get from step 1.  You can skip pairings with the same charge - a + can't get close to another + to react.
3.  Use solubility, acid/base, and redox rules to see if anything will happen with the ions in solution.<span />
3 0
3 years ago
The volume of a sample of water is 2.5 mL the volume of the sample in liters is
lisabon 2012 [21]

Answer:

0.0025Litters

Explanation:

2.5ml= 2.5x10^-3l

2.5ml= 0.0025l

7 0
2 years ago
Other questions:
  • Molly made 3600 ml of tea for a party, and she served the tea divided equally in 12 cups. how many liters of tea did molly put i
    14·2 answers
  • Which factors help you identify the solute and the solvent in a solution? Select all that apply. In a solution, the solvent is p
    12·2 answers
  • Which substance will require more energy to heat if all the samples have the same mass and same temperature change?
    15·1 answer
  • Help asap please ty :)
    10·1 answer
  • A beaker holds xliters of 0.2M AlBr3. Give answers to parts a through din terms of x.a) How many moles of aluminum ions are ther
    12·1 answer
  • How many acidic H+ ion is given by H3BO3 in aqueous solution?? ...?
    6·1 answer
  • The mass of an atom is ________________________.
    14·2 answers
  • Need the names for these asap please ​
    10·1 answer
  • Help I’m so confused
    15·2 answers
  • How many moles of NaCl are required to make 2.85L of a 0.10M solution?Use the correct abbreviation for the UNITS and watch the S
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!