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
castortr0y [4]
3 years ago
5

An electron-dot structure is a convenient method of representing

Chemistry
1 answer:
kherson [118]3 years ago
8 0

Answer:

all electrons of the atom

You might be interested in
How many moles of calcium chloride, cacl2, can be added to 1.5 l of 0.020 m potassium sulfate, k2so4, before a precipitate is ex
Brut [27]
When CaSO4 → Ca2+ + SO4
So when we have Ksp = [Ca2+][SO4]

when Ksp = 4.93 x 10^-5
and [SO4] = 0.02 M 
so by substitution we can get [Ca2+] 
4.93x10^-5 = [Ca2+] [0.02]
∴ [Ca2+] = 0.0025 mol/L

∴ the moles of calcium chloride = 0.0025 mol / L * 1.5 L
                                                      = 0.00167 mol

4 0
3 years ago
How many moles of hydrogen are in the sample?<br> Round your answer to 4 significant digits.
finlep [7]

Answer:

1.56 mol H₂

Explanation:

Mg₃(Si₂O₅)₂(OH)₂

<em>There are 4 Si moles per Mg₃(Si₂O₅)₂(OH)₂ mol</em>. With that in mind we can <u>calculate how many Mg₃(Si₂O₅)₂(OH)₂ moles are there in the sample</u>, using the <em>given number of silicon moles</em>:

  • 3.120 mol Si * \frac{1molMg_3(Si_2O_5)_2(OH)_2}{4molSi} = 0.78 mol Mg₃(Si₂O₅)₂(OH)₂

Then we can <u>convert Mg₃(Si₂O₅)₂(OH)₂ moles into hydrogen moles</u>, keeping in mind that <em>there are 2 hydrogen moles per Mg₃(Si₂O₅)₂(OH)₂ mol</em>:

  • 0.78 mol Mg₃(Si₂O₅)₂(OH)₂ * 2 = 1.56 mol H₂
8 0
3 years ago
In the reaction N2O4(g) 2NO2(g), what changes in color would you expect as pressure is increased at constant temperature?
skelet666 [1.2K]

Answer:

Brown color of the solution decreases

Explanation:

NO_2 is brown in color whereas N_2O_4 is colorless.

Equilibrium reaction between NO_2 and N_2O_4 is as follows:

2NO_2\leftrightharpoons N_2O_4

As per the Le Chatelier's principle, if pressure of a equilibrium is increased, the equilibrium will shift in the direction having fewer no. of moles of gases.

In the given equilibrium, NO_2 side has more no. of moles. So on increasing pressure, equilibrium will shift towards the side of N_2O_4 or more formation of N_2O_4 will take place.

Therefore, more NO_2 will decompose that will decrease the brown color of the solution as N_2O_4 is colorless.

6 0
3 years ago
What are some benefits that come from volcanoes?
nataly862011 [7]

Answer:

Volcanoes cool off the earth by emitting heat from its interior. They also add islands and for example, Hawaii was created / is made out of volcanoes. The deposits from volcanoes can also be used for building materials. Volcanic explosions have caused the atmosphere and oceans to form. Volcanic deposits also create land which is fertile.

7 0
3 years ago
Can someone please help me with this question
12345 [234]

Explanation:

a) 3Pb(NO3)2 + Al2(SO4)3 ---> 3PbSO4 + 2Al(NO3)3

Double displacement

b) 2Cl2 + 3O2 ---> 2Cl2O3

Synthesis

c) 2Fe2O3 + 3C ---> 4Fe + 3CO2

single displacement

8 0
3 years ago
Other questions:
  • You walked outside at lunch time on March 21st and look up in the sky and see the Sun directly overhead. You recall that there w
    5·1 answer
  • Can you answer this for me
    7·2 answers
  • In a problem, you are given two pressures and one temperature at constant volume and amount of gas. You are asked to find a seco
    15·2 answers
  • The pressure of 4.2L of nitrogen gas in a flexible container is decreased to one-half its original pressure and its absolute tem
    8·1 answer
  • Matter is made up of small
    12·2 answers
  • WILL GIVE POINTS AND BRAINLIEST<br> Question:<br> Number of H− ions in 5.22 g of SrH2
    11·1 answer
  • Calculate the second volumes. 955 L at 58 C and 108 KPa to 76 C and 123 KPa
    8·1 answer
  • How many liters of solution would it take to make a 0.250 M solution when you have 3.52 moles of solute?
    14·1 answer
  • Please answer the question that is attached to this question. It will be a BIG help for my homework if you give a proper explana
    14·1 answer
  • 3. 6 th grade Question
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!