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
8090 [49]
3 years ago
13

In the electron cloud model, the electron cloud is denser in some locations than in others.

Chemistry
1 answer:
Sonbull [250]3 years ago
8 0
<span>In the electron cloud model, the denser areas represent that there is a great probability that a good number of electrons are ganged up or crowded in that area. The electrons affect the density of some parts of the electron cloud when they condense in those locations.</span>
You might be interested in
A first-order reaction has a half-life of 29.2 s . how long does it take for the concentration of the reactant in the reaction t
Dmitriy789 [7]

Answer is: it takes 116,8 seconds to fall to one-sixteenth of its initial value

<span> The half-life for the chemical reaction is 29,2 s and is independent of initial concentration.
c</span>₀ - initial concentration the reactant.

c - concentration of the reactant remaining at time.

t = 29,2 s.<span>
First calculate the rate constant k:
k = 0,693 ÷ t = 0,693 ÷ 29,2 s</span> = 0,0237 1/s.<span>
ln(c/c</span>₀) = -k·t₁.<span>
ln(1/16 </span>÷ 1) = -0,0237 1/s · t₁.

t₁ = 116,8 s.

5 0
3 years ago
Because of river discharge, large changes in ocean salinity often occur __.
Lorico [155]
I’m guessing it would be A because the river discharge tends to gather near coastlines where the river ends
5 0
3 years ago
Calculate the molality of a solution formed by adding 6.30 g NH4CL to 15.7 g of water
babymother [125]

Answer:

Molality = 7.5 mol/kg

Explanation:

Given data:

Mass of NH₄Cl = 6.30 g

Mass of water = 15.7 g (15.7/1000 =0.016 kg)

Molality = ?

Solution:

Formula of molality:

Molality = Moles of solute / mass of solvent in gram

Now we will first calculate the number of moles of solute( NH₄Cl )

Number of moles = mass/ molar mass

Molar mass of  NH₄Cl = 53.491 g/mol

Number of moles = 6.30 g/  53.491 g/mol

Number of moles =  0.12 mol

Now we will calculate the molality.

Molality = Moles of solute / mass of solvent in gram

Molality =  0.12 mol / 0.016 kg

Molality = 7.5 m

or        (m=mol/kg)

Molality = 7.5 mol/kg

6 0
3 years ago
Which two kinds of energy are associated with flames?
nekit [7.7K]

Answer:

Type= Thermal Energy , Motion = Random motion of microscopic particles of matter , Example = Heat, Fire

Type= Electrical energy, Motion = Bluk flow of chorges , Example = Household current , AC and DC circuits.

Explanation:

keep it up!!!!

7 0
3 years ago
The decomposition of dinitrogen pentaoxide has an activation energy of 102 kj/mol and \delta ? h°rxn = + 55 kj/mol. what is the
posledela
A positive cahnge of enthalpy, ΔH rxn = + 55 kJ/mol, for the forward reaction means that the reaction is endothermic, i.e. the reactants absorb energy and the products are higher in energy.

Activation energy is the difference in the energy level of the reactants and the peak in the potential energy diagram (the energy of the transition state).

For an endothermic reaction, the products will be closer in energy to the transition state than what the reactans will be; so, the activation energy of the reversed reaction is lower than the activation energy of the forward reaction.

Activation energy of reverse and forward reactions is related by:

Activation energy of reverse rxn = Activation energy of forward rxn - ΔH rxn

=> Activiation energy of reverse rxn = 102 kJ/mol - 55 kJ/mol = 47 kJ/mol

Answer: 47 kJ/mol
8 0
3 years ago
Other questions:
  • Convert 2.859 liters to milliliters..
    12·2 answers
  • RIGHT ANWSER GETS MARKED BRAINLIEST
    11·2 answers
  • Given the two compounds propane and pentanone, the one with the higher boiling point is
    14·1 answer
  • Use the following equation to answer the question below:
    12·1 answer
  • There are 24 g of carbon in a substance with a mass of 30 g. What is the percent carbon by mass for this substance?
    10·1 answer
  • Trial 1: Heat 30.0 grams of water at 0 °C to a final temperature of 40.0 °C.
    5·1 answer
  • लेख्नुहोस् । (Deserts are very hot during the day and very cold<br> during the night. Give reason.)
    11·2 answers
  • The Second Law of Thermodynamics states that the overall entropy of the universe (or any other isolated
    9·2 answers
  • 1) Alarge doud of dust and gas spread out in a large area is
    7·1 answer
  • What is the pressure in atm exerted by 1.8 g of H_{2} gas exert in a 4.3 L balloon at 27°C? R =; 0.821(L^ * atm)/(mol^ * K)
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!