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
lesantik [10]
3 years ago
10

Determine the number of molecules present in a 4.56 mol sample of methane gas (CH4); then determine the number of hydrogen atoms

in the sample
Chemistry
1 answer:
AnnyKZ [126]3 years ago
6 0

Avogadro’s number is 6.02 x 10^ 23 atoms (or molecules) per mole. Through units cancellation:

Number of atoms = (4.56 mol)( 6.02 x 10^23 molecules/ mol) = 2.74 x 10^ 24 molecules

Since the C:H ratio is 1:4, 1 molecule of CH4 will have 4 atoms of hydrogen,

Therefore  number of H = 4 (2.74 x 10^24 molecules) = 1.098 x 10^ 25 atoms 

You might be interested in
The reaction between bromine gas and fluorine gas to create bromine monofluoride gas has reached equilibrium. what is the effect
WITCHER [35]
More bromine gas will be produced.
5 0
3 years ago
Which of the following elements is a metalloid
klemol [59]
A metalloid can be:
 - Boron (B)
 - Silicon (Si)
 - Germanium ( Ge)
 - Arsenic (As) 
 - Antimony ( Sb)
 - Tellurium (Te)
 - Polonium (Po)

Hope this helps :)
6 0
3 years ago
Read 2 more answers
Explain how you would make 450 mL of a .250M NaOH solution?
Neporo4naja [7]

Answer:

Weigh 4.5 grams of sodium hydroxide and add it to the dry volumetric flask of 450 mL followed by small amount of water to dissolve all the NaOH .After this add the water upto tye mark of 450 mL.

Explanation:

Molarity of the solution is the moles of compound in 1 Liter solutions.

Molarity=\frac{\text{Mass of compound}}{\text{Molar mas of compound}\times Volume (L)}

Mass of NaOH = x

Molar mass of NaOH = 40 g/mol

Volume of the NaOH solution =  450 mL =- 0.450 L ( 1 ml = 0.450 L)

Molarity of the solution of NaOH = 0.250 M

Molarity=\frac{1.248 g}{26 g/mol\times 0.9102254 L}=0.528 mol/L

0.250 M=\frac{x}{40 g/mol\times 0.450 L}

Solving for x:

x = 4.5 g

Weigh 4.5 grams of sodium hydroxide and add it to the dry volumetric flask of 450 mL followed by small amount of water to dissolve all the NaOH .After this add the water upto tye mark of 450 mL.

4 0
3 years ago
How many grams are present in a sample of aluminum?
MrMuchimi
Hyjhpyijyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyt      y y y y y y y y  yy   y y  y    y  y y   y y    y y y  y y y y y

5 0
3 years ago
one of the tallest dog breeds is the great dane which stands over a meter tall. one of the shortest is the pomeranian which stan
Gemiola [76]
We know that domestic dogs are descended from wolves. Exactly when and how this occurred is still being studied; many experts indicate that dogs were first domesticated about 12,000 years ago, but a few DNA studies indicate a much earlier date for the split between the wolf and the dog, perhaps as long ago as 130,000 years. Regardless of the exact timing of the divergence between wolves and dogs, one thing is true: both species display quite a bit of genetic diversity, particularly in size and coloration.In order to breed a dog of a specific size, all one has to do is choose parents with the appropriate variations. For instance, if you want to create a small dog breed, you would just breed the smallest dogs you have, then you would choose their smallest offspring to breed the next generation, and so on until you have reached the desired size.
8 0
3 years ago
Read 2 more answers
Other questions:
  • What is the hydrogen ion concentration if the ph is 3.7?
    7·1 answer
  • Static electricity is the buildup of electric charges in
    5·1 answer
  • The electron configuration of vanadium (III)ion is:
    11·2 answers
  • Calculate the pH of a solution containing a caffeine concentration of 455 mg/L . Express your answer to one decimal place.
    14·1 answer
  • Which of these is an element?
    8·2 answers
  • Which car traveled a greater distance? Car A traveled 25 miles/hour for 3 hours, stopped for an hour, and then traveled 35 miles
    12·1 answer
  • A solution of 100.0 mL of 0.200 M KOH is mixed with a solution of 200.0 mL of 0.150 M NiSO4. (a) Write the balanced chemical equ
    6·1 answer
  • NEED HELP NOW
    7·1 answer
  • What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?
    15·1 answer
  • Nitrogen gas was collected by water displacement. What was pressure of the N, collected if the temperature was 22 °C?​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!