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
How many grams will be produced??
Akimi4 [234]

Explanation:

b is correct. 30.6 g H2O is produced.

3 0
3 years ago
A 0.04358 g sample of gas occupies 10.0-ml at 292.0 k and 1.10 atm. upon further analysis, the compound is found to be 25.305% c
kirill [66]
<span>Answer: A 0.04403 g sample of gas occupies 10.0-mL at 289.0 K and 1.10 atm. Upon further analysis, the compound is found to be 25.305% C and 74.695% Cl. What is the molecular formula of the compound? --------------------------------------... Seems like I did a problem very similar to this--this must be the "B" test. But the halogen was different. 25.305% C/12 = 2.108 74.695% Cl/35.5 = 2.104 So the empirical formula would be CH. However, there are many compounds which fit this bill, so we have to use the gas data. (And I made, in the previous problem, the simplifying assumption that 289C and 1.10 atm would offset each other, so I'll do that, too.) 0.044 grams/10 ml = x/22.4 liters 0.044g/0.010 liters = x/22.4 liters 22.4 liters/0.010 liters = 2240 (ratio) 2240 x .044 = 98.56 (actual atomic weight) CCl = 35.5+12 or 47.5, so two of those is 95 grams/mole. This is sufficiient to distinguish C2CL2, (dichloroacetylene) from C6CL6 (hexachlorobenzene) which would mass 3 times as much.</span>
3 0
3 years ago
Read 2 more answers
28Which is true?
sergij07 [2.7K]
28) All elements are made of atoms

29)Protons and Neutrons
-Electrons make up the outside of the Nucleus
8 0
3 years ago
in order to decrease the freezing point of 500. g of water to 1.00° c how many grams of ethylene glycol (C2H602)must be added (K
sesenic [268]

Answer:

if wrong sorry ok????

6 0
2 years ago
the daily dose of ampicillin for the treatment of an ear infection is 115 mg/kg of body weight. what is the daily dose for a 43-
Lorico [155]
M=43lb = 19,5kg

If 115mg --------- is for --------- 1kg
                             so
    x        ---------- is for --------- 19,5kg

x = 19,5kg * 115mg / 1kg
x = 2242,5 mg
6 0
2 years ago
Read 2 more answers
Other questions:
  • Question 4 (1 point)
    12·1 answer
  • How might you cause a saturated solution of lithium sulfate to form a precipitate?
    13·1 answer
  • Which statements about the equation shown above are correct? Check all that apply. It represents a reaction that involves rearra
    7·2 answers
  • What is 7% as a decimal?
    7·1 answer
  • How many moles of HBr are present in 250 ml of a 0.15 M HBr solution?
    11·1 answer
  • Type the correct answer in the box. Express your answer to three significant figures.
    12·2 answers
  • The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. Rhenium-185 has in its nucleus
    8·1 answer
  • A solution contains AgNO3 and Ba(NO3)2. What substance could be added to the solution to precipitate Ag+ ions, but leave Ba2+ io
    9·1 answer
  • When molybdate (MoO3) and Zinc (Zn) are heated together they react in this equation:
    7·1 answer
  • Please help! Fill the blank
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!