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
ch4aika [34]
3 years ago
8

How many molecules in H2O?

Chemistry
1 answer:
Mrac [35]3 years ago
3 0
There are a lot of molecules in H2O.<span />
You might be interested in
Infrared radiation can be detected by
Norma-Jean [14]
Infrared radiation can be detected by <span>D. night-vision goggles.</span>
7 0
3 years ago
Calcium carbonate decomposes to form calcium oxide and carbon dioxide, like this:
Leni [432]

Answer: The value of the equilibrium constant Kc for this reaction is 0.088

Explanation:

Molarity=\frac{x}{M\times V_s}

where,

x = given mass

M = molar mass

V_s = volume of solution in L

Equilibrium concentration of CaCO_3 = \frac{25.3}{100\times 9.0}=0.028M

Equilibrium concentration of CaO = \frac{14.9}{56\times 9.0}=0.029M

Equilibrium concentration of CO_2 = \frac{33.7}{44\times 9.0}=0.085M

The given balanced equilibrium reaction is,

CaCO_3(s)\rightleftharpoons CaO(s)+CO_2(g)

The expression for equilibrium constant for this reaction will be,

K_c=\frac{[CaO]\times [CO_2]}{[CaCO_3]}  

Now put all the given values in this expression, we get :

K_c=\frac{0.029\times 0.085}{0.028}=0.088

7 0
3 years ago
How many meters in 1000 mm
iris [78.8K]
1000 mm equals 1 meter
7 0
4 years ago
Read 2 more answers
Magnesium has three naturally occurring isotopes with masses of 23.99, 24.99, and 25.98 amu and natural abundances of 78.99%, 10
Darya [45]
Atomic mass of magnesium = (23.99 x 78.99%) + (24.99 x 10.00%) + (25.98 x 11.01%)
= 24.31 g/mol
5 0
4 years ago
Why does a solution of NaOH have to be standardized against a primary standard as supposed to just using the mass and volume to
Rudik [331]

NaOH is hygroscopic

Explanation:

  • A standard solution is a solution of known molarity or concentration.
  • Standard solutions are used in determining the stoichiometric amount of desired species in an experiment.
  • A solution of NaOH is not a standard solution because NaOH is hygroscopic in nature.
  • By this, NaOH absorbs moisture from the atmosphere in considerable amount.
  • This implies that one must find an air free environment to store and use the compound and accurately quantify it.
  • This is why a solution of NaOH is standardize with a primary standard.

Learn more:

Titration brainly.com/question/4306497

#learnwithBrainly

8 0
3 years ago
Other questions:
  • A 100.0 mL sample of 0.300 M NaOH is mixed with a 100.0 mL sample of 0.300 M HNO3 in a coffee cup calorimeter. If both solutions
    6·2 answers
  • Determine the percent ionization of a 0.145 m hcn solution.
    11·1 answer
  • Why did you have to remove co2 from your partially neutralized stomach acid before the titration?
    14·1 answer
  • Match the labels to the
    9·1 answer
  • When 6.36 g of metallic chromium is heated with elemental chlorine gas, 19.37 g of a chromium chloride salt results. Calculate t
    13·1 answer
  • name the following chemical compound. b2br4 a. boron borate b. bromate boride c. boride tetrabromine d. diboron tetrabromide
    8·1 answer
  • How does the tilt of earth <br>affect the climate?
    15·1 answer
  • Letter D represents an energy level that holds electrons, what is another name for that ring, or energy level?
    7·1 answer
  • Which material has carbon atoms interspersed with iron atoms in its molecular structure?
    12·1 answer
  • Reema took 5ml of Lead Nitrate solution in a beaker and added approximately 4ml of Potassium Iodide solution to it. What would s
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!