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
hichkok12 [17]
3 years ago
13

Consider 2H2 + O2 → 2H2O. To produce 1.2 g water, how many grams of H2 are required? Report to the correct number of significant

figures. Show work for full credit!
Chemistry
1 answer:
Elden [556K]3 years ago
3 0

Answer:

0.133 mol (corrected to 3 sig.fig)

Explanation:

Take the atomic mass of H=1.0, and O=16.0,

no. of moles = mass / molar mass

so no. of moles of H2O produced = 1.2 / (1.0x2+16.0)

= 0.0666666 mol

From the equation, the mole ratio of H2:H2O = 2:2 = 1:1,

meaning every 1 mole of H2 reacted gives out 1 mole of water.

So, the no, of moles of H2 required should equal to the no, of moles of H2O produced, which is also  0.0666666 moles.

mass = no. of moles x molar mass

hence,

mass of H2 required = 0.066666666 x (1.0x2)

= 0.133 mol (corrected to 3 sig.fig)

You might be interested in
The energy required to split apart dichlorine according to the equation is 3.99 × 10-19 J/molecule. Cl2(g) → 2Cl(g) Calculate th
Natasha2012 [34]

Answer:

The frequency of the photon that can dissociate dichlorine is 6.02×10¹⁴ Hz

Explanation:

The energy of a photon is given by the equation:

E=h·f

E=3.99×10⁻¹⁹ J/molecule

h (Planck's constant)=6.626×10⁻³⁴ m²·kg/s

∴ f=E/h

f=\frac{3.99*10^{-19}J}{6.626*10^{-34} m²·kg/s}=6.02×10¹⁴ s⁻¹= 6.02×10¹⁴ Hz

5 0
3 years ago
The student's lab manual says to mix some of his Na2CO3 solution with an aqueous solution of copper(II) sulfate (CuSO4)
lord [1]

Explanation:

When the student mixed the solution sodium carbonate with solution of copper(II) sulfate ; Copper Hydroxocarbonate , sodium sulfate and carbon dioxide gas was obtained as a products.

The balanced chemical reaction

2Na_2CO_3+2CuSO_4\rightarrow Cu_2(OH)_2CO_3+2Na_2SO_4+CO_2

Where:

Cu_2(OH)_2CO_3 = Copper(II) Hydroxocarbonate

Na_2CO_3 = Sodium carbonate

CuSO_4 = Copper(II) sulfate

Na_2SO_4 = Sodium sulfate

CO_2 = Carbon-dioxide

3 0
3 years ago
The sum of the atomic mass values of the atoms in a chemical formula is known as ____________.​
nydimaria [60]

Answer:

I believe this is called the 'molar mass'

5 0
2 years ago
Robidium and cesium have similar chemical properties because in the ground it states the atoms of both elements each have
anzhelika [568]
It would be one electron in the outermost shell. Hope this helps!
5 0
3 years ago
State three natural conditions under which plasmolysis could occur
S_A_V [24]

Answer:

  1. When the cell is placed in salt solution
  2. When leave celss dry
  3. When cells are placed in sugar solution

Explanation:

Hope this helps

4 0
2 years ago
Other questions:
  • As the solar system formed, most of its mass became concentrated in one part of it. What is that that part?
    10·2 answers
  • State the reason that soft drinks is a mixture and water is a compound?
    10·2 answers
  • How many planets are in the solar system?
    10·2 answers
  • Identify the activity that belongs in the field of chemistry.
    10·2 answers
  • What’s the distance from the nucleus of an atom to its theoretical outer edge of electron orbits
    9·1 answer
  • Which is an acid-conjugate base pair?
    11·2 answers
  • Which salt preparation uses a burette and a pipette
    15·1 answer
  • Perform the following mathematical operation and report the answer to the correct number of significant figures? ( I have watche
    6·1 answer
  • How many liters will 2.76 mol CO2 occupy?<br> 2.76 mol<br> II
    9·1 answer
  • Calculate the mass of butane needed to produce 71.9 g of carbon dioxide.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!