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
laiz [17]
3 years ago
9

How many moles of water are represented by 8.33×10^18 molecules of water​

Chemistry
1 answer:
DENIUS [597]3 years ago
7 0

Answer:

number of moles of water (n) = 1.383 x10 ⁻⁵ mol

Explanation:

Data Given:

No. of molecules of water =  8.33×10¹⁸

No. of Mole of water = ?

Formula Used to calculate

no. of moles = numbers of particles (ions, molecules, atoms) /Avogadro's number

Avogadro's no. = 6.023 x10²³

So the formula could be written as

                no. of moles (n) = no. of molecules of water /6.023 x10²³

Put the values in above formula

                 no. of moles (n) = 8.33×10¹⁸ /6.023 x10²³

                  no. of moles (n) = 8.33×10¹⁸ /6.023 x10²³

                  no. of moles (n) = 1.383 x10 ⁻⁵

so  1.383 x10 ⁻⁵ moles of water are represented by  8.33×10¹⁸ molecules of water.

   

You might be interested in
Differentiate the three pictures and explain them briefly.
Dmitry [639]

Answer:

answer

<u>Cold Front - a zone separating two air masses, of which the cooler, denser mass is advancing and replacing the warmer. </u>

<u>Warm Front - a transition zone between a mass of warm air and the cold air it is replacing. </u>

<u>Stationary Front - a front between warm and cold air masses that is moving very slowly or not at all.</u>

8 0
3 years ago
Which form of energy is stored chemical energy and example of?
Masja [62]

Answer:

D

Explanation:

I THINK. HOPE THIS HELPS

3 0
3 years ago
Read 2 more answers
PLEASE HELP ME ASAP!!!!!! YOU GET 10 POINTS!!!!!!
Semmy [17]

Answer:

Here is the ANSWER KEY, it may also has other of the questions you don't know :)

Explanation:

https://sciencewithhorne.weebly.com/uploads/5/7/3/5/57358947/unit_11_hw_key.pdf

3 0
3 years ago
Quinine (C20H24N2O2) is the most important alkaloid derived from cinchona bark. It is used as an antimalarial drug. For quinine
dolphi86 [110]

Answer:

The pH of saturated solution of the quinine is 10.05

Explanation:

Quinine (Q) is C20H24N2O2 has a molar mass of 324.4 g/mol

Q can behave as a weak base. Kb and pKb can be calculated for weak bases

pKb1 is to be considered when solving the question.

pKb1 = 5.1

Step 1 : Calculate the Kb of Quinine

            pKb1 = - log [kb]

                5.1  = - log [kb]

                take Antilog of both side

             [kb] = 7.94 x 10∧-6

Step 2: Calculate the concentration of saturated solution of Q in mol/dm3

           From the question, 1900 ml of solution contains 1 g of Q

           Therefore,  1000 ml of solution will contain........... x g of Q

           x = 1000 /1900

           x = 0.526 g in 1 dm3

In calculating concentration in mol/dm3,

Concentration in mol/dm3 = concentration in g /dm3 divided by molar mass

Molar mass of Q = 324.4

Concentration in mol/dm = 0.526 /324.4

                                         = 0.0016 mol/dm3

Step 3: Calculating the Concentration of OH-

            At Equilibrium, Kb = x² / 0.0016

            7.94 x 10∧-6 = x² / 0.0016

            x = √ 0.0016 × 7.94 x 10∧-6

            x = 1. 127 × 10∧-4 mol/dm3

The concentration of OH- = 1. 127 × 10∧-4 mol/dm

Step 4:  Calculating the pH of Quinine

           Recall, pOH = - log [OH-]

           pOH = - log [1. 127 × 10∧-4]

           pOH = 3.948

           Also recall that pH + pOH = 14

           pH = 14 - 3.948

           pH = 10.05

           

8 0
4 years ago
Lead(II) nitrate and ammonium iodide react to form lead(II) iodide and ammonium nitrate according to the reaction
inessss [21]

Answer:

Explanation:

2 NH4I    + Pb(NO3)2   =  PbI2  + 2 NH4NO3

2 mol          1 mol

x ml             751 ml

0.550 M      0.380 M

0.380 mol/1000 ml  x 751 ml =  0.285 mol Pb(NO3)2

0.285 mol Pb(NO3)2 x 2 mol NH4I/1 mol  Pb(NO3)2=0.571 mol  NH4I  needed

0.571 mol  NH4I/0.550 mol/1000 ml=1038 ml

6 0
3 years ago
Other questions:
  • 1. Convert 2.5 J into calories
    5·1 answer
  • Water is unusual because it expands as it freezes, Very few substances have this property. The reason liquid water is more dense
    8·2 answers
  • An unstable nucleus loses the most mass if the nucleus emits
    15·1 answer
  • What would be the major product obtained from hydroboration–oxidation of the following alkenes?
    6·1 answer
  • C6H1206 +602 → 6002 + 6H20 AH = -2,799 kJ
    6·1 answer
  • HELP! 10 points rewarded, plus, best answer gets BAINLIEST!!
    10·1 answer
  • The diagram shows four different locations in an atom. A shaded circle is shown, labeled nucleus. Two small points labeled one a
    13·2 answers
  • Just the question "is the heat going into the water or coming out of it "
    8·2 answers
  • What are the common properties of the following element groups:
    14·1 answer
  • Which observation most likely indicates that only a chemical change has taken place
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!