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
zloy xaker [14]
3 years ago
8

How many molecules are contained in a 7.20-g sample of dimethylmercury?

Chemistry
2 answers:
Art [367]3 years ago
7 0

Answer:

1.88x10^{22}molecules (CH_3)_2Hg

Explanation:

Hello,

Dimethylmercury: (CH_3)_2Hg has a molecular mass of:

M_{(CH_3)_2Hg}=12*2+1*6+200.59=230.6g/mol

Now, the following mass-mole relationship including the Avogadro's number allows us to compute the requested molecules as follows:

7.20g(CH_3)_2Hg*\frac{1mol(CH_3)_2Hg}{230.6g(CH_3)_2Hg} *\frac{6.022x10^{23}molecules (CH_3)_2Hg}{1mol(CH_3)_2Hg} =1.88x10^{22}molecules (CH_3)_2Hg

Best regards.

jekas [21]3 years ago
3 0
The formula for dimethyl mercury is. HgC2H6 = (2x12) + (6x1) + (1x200.6) = 230.6 
So the molar mass of dimethyl mercury is 230.6 g/mol. 
Number of moles in 4.2g of dimethymercury = 4.2/ 230.6 = 0.0182 moles.  
1 moles of dimethymercury contains 6.02 * 10^23 
Hence 0.0182 moles contains X 
X = 0.0182 * 6.02 * 10^23 = 0.10952 * 10^23 = 1.0952 * 10^22.
You might be interested in
I need help with these
Delvig [45]

Answer:

9yuigyu need points sorry

Explanation:

4 0
3 years ago
URGENT WILL GIVE BRAINLEIST In two or more complete sentences explain how to balance the chemical equation,
Pani-rosa [81]

Answer:

you add the atoms together

Explanation:

3 0
3 years ago
Read 2 more answers
Hi everyone can anyone help with this, the question and diagram is in the pic thx!
seraphim [82]

Answer:

QP

Explanation:

P has 9 electrons.

Electronic Configuration : 2, 7

Valence electrons : 7

P needs 1 electron to get stable electronic configuration.

Q has 3 electrons.

Electronic Configuration : 2, 1

Valence electrons : 1

P needs to loose 1 electron to get stable electronic configuration.

Q donates 1 electron,

Q -----> Q+ + 1 e-

P gains 1 electron,

P + 1 e- -----> P-

Q+ + P- -----> QP

This is an ionic compound.

8 0
3 years ago
How many equivalents are present in 10 g of Ca2+? <br> 1 <br> 0.5 <br> 1.5 <br> 2
Lynna [10]

0.5

Explanation:

Given parameters:

Mass of Ca²⁺ = 10g

unknown:

Equivalent weight = ?

Solution:

Equivalent weight that is the amount of electrons which a substance gains or loses per mole.

Ca²⁺ has +3 charge

It lost 2e⁻;

therefore;

  In 1 mole of  Ca²⁺, we have 2 equivalent weight

1 mol  Ca²⁺ = 2eq. wts. 

1 mol Ca x (40 g / 1 mol ) x (1 mol / 2 eq.wts.) = 20.0 g = 1 eq.wt. 

Therefore;

10.0 g  Ca²⁺ x (1 eq.wt. / 20.0 g) = 0.5 eq.wts.

learn more:

Molar mass brainly.com/question/2861244

#learnwithBrainly

8 0
3 years ago
What are homogenous mixtures
svetoff [14.1K]

Answer:

a mixture in which the composition is uniform throughout the mixture.

Explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • Choose the correct statement. Ammonia is a strong base. HCl is a strong base. Water is a strong acid. HCO3 is a strong acid.
    8·2 answers
  • Why are silver, platinum, palladium and osmium called noble metals?
    6·1 answer
  • Drag the description to the category
    11·1 answer
  • 7-10. Fine whichever is missing out of pH, POH, (H+), and [OH-].
    13·1 answer
  • PLEASE SOMEBODY HELP PLEASE ! I WILL MARK BRAINLY I PROMISE !
    5·1 answer
  • A 5.0 gram sample of Ag2SO4, will dissolve in 1.0 L of water. Calculate the solubility product
    12·1 answer
  • 0.398 mol AgNO3 and 2.73 mol NH3 were added to enough water to give 1.00 L of solution at 25 °C. Calculate the equilibrium conce
    5·1 answer
  • PLS ANSWER I WILL MARK U BRAINLIEST AND GIVE U THANK U
    7·1 answer
  • How many molecules of co2 are in a 500. 0 ml container at 780 mm hg and 135°c? 8. 76 × 1021 molecules 9. 23 × 1021 molecules 5.
    7·1 answer
  • Beryllium has an atomic number of 4. How many neutrons does the isotope beryllium-9 have?.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!