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
rosijanka [135]
3 years ago
6

Select all statements that are true about molecules. (There may be more than one correct answer, select all that apply)

Chemistry
1 answer:
padilas [110]3 years ago
5 0
 B.two or more atoms of one or more elements that are linked by shared electrons<span>
C. pure substance</span> <span> D. can be found in elements and compounds</span>  
You might be interested in
What is the average atomic mass of lithium?
leonid [27]
The average atomic mass of lithium is 6.941 amu.
4 0
4 years ago
Given the two reactions PbCl2(aq)⇌Pb2+(aq)+2Cl−(aq), K3 = 1.85×10−10, and AgCl(aq)⇌Ag+(aq)+Cl−(aq), K4 = 1.17×10−4, what is the
kramer

Answer:

The equilibrium constant of the given reaction is 0.01351.

Explanation:

PbCl_2(aq)\rightleftharpoons Pb^{2+}(aq)+2Cl^-(aq)

The equilibrium constant of the reaction = K_3=1.85\times 10^{-10}

K_3=\frac{[Pb^{2+}][Cl^-]^2}{[PbCl_2]}...[1]

AgCl(aq)\rightleftharpoons Ag^{+}(aq)+Cl^-(aq)

The equilibrium constant of the reaction = K_4=1.17\times 10^{-4}

K_4=\frac{[Ag^+][Cl^-]}{[AgCl]}..[2]

[Cl^-]=\frac{K_4\times [AgCl]}{[Ag^+]}

PbCl_2(aq)+2Ag^+(aq)\rightleftharpoons 2AgCl(aq)+Pb^{2+}(aq)

The expression of equilibrium constant of the creation is ;

K=\frac{[AgCl]^2[Pb^{2}]}{[PbCl_2]][Ag^+]^2}

Dividing [1] by [2]

\frac{K_3}{K_4}=\frac{\frac{[Pb^{2+}][Cl^-]^2}{[PbCl_2]}}{\frac{[Ag^+][Cl^-]}{[AgCl]}}

\frac{K_3}{K_4}=\frac{[Pb^{2+}][Cl^-][AgCl]}{[PbCl_2][Ag^+]}

Substituting the value of [Cl^-] from [2] :

\frac{K_3}{K_4}=\frac{[Pb^{2+}][AgCl]}{[PbCl_2][Ag^+]}\times \frac{K_4\times [AgCl]}{[Ag^+]}

\frac{K_3}{K_4}=K_4\times K

K=\frac{K_3}{(K_4)^2}=\frac{1.85\times 10^{-10}}{(1.17\times 10^{-4})^2}

K=0.01351

The equilibrium constant of the given reaction is 0.01351.

3 0
3 years ago
If a jet's cruising altitude is 32,200 ft (to three significant figures), this distance in km is: (1 mile = 1.61 km; 1 mile = 52
DochEvi [55]

If a jet's cruising altitude is 32,200 ft (to three significant figures), this distance in km is 9.82 km.

<h3>What are significant figures?</h3>

Significant figures are the number of digits in a value, often a measurement, that contributes to the degree of accuracy of the value. We start counting significant figures at the first non-zero digit.

In this case, given the conversion factors from miles to kilometres and from miles to feet, we can directly compute the jet’s cruising altitude in kilometres as shown below:

32200 ft X \frac{1 mile}{5280 ft}  X \frac{1.61km}{1 mile}

=9.82 km

Learn more about the significant figures here:

brainly.com/question/14359464

#SPJ1

6 0
3 years ago
A lahar is a type of mudflow that occurs
maria [59]

after a volcanic eruption is the answer

Mudflows of volcanic eruptions are the most dangerous, and are called lahars

4 0
4 years ago
What is the density of the marble when the mass = 10g
Marysya12 [62]
The density of marble is between 2.6 and 2.8 grams per cm³ .

Density doesn't depend on how much mass or volume of it you have.
The density of a chip of it is the same as the density of a truckload of it.
3 0
4 years ago
Other questions:
  • How would you determine the proper number of significant figures of a Liquid using a graduated cylinder
    15·1 answer
  • Wave energy from the ocean can be harnessed to power generators to make electricity. Energy from rides can also be used to make
    12·2 answers
  • Is metal getting warmer a physical or chemical change
    9·2 answers
  • What type of bonding holds the atoms in an h2o molecule together?
    9·1 answer
  • "When sprayed with water, the flowers did not turn pink (or did not turn pink very much)."
    13·1 answer
  • A 0.223 mole sample of gas is held at 33.0 C and 2.00 atm, What's the volume of the gas? R = 0.0821 L atm / mol K answer soon il
    10·1 answer
  • Arrange the events in the life of a star in the correct order.
    14·1 answer
  • How would one make a 2 M solution of a compound?
    13·1 answer
  • What do these red/yellow/orange-precipitate reactions have in common? (choose
    11·1 answer
  • What type of precipitation occurs more frequently during winter storm ?? rain
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!