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
Maslowich
4 years ago
14

Manganese(iv) oxide reacts with aluminum to form elemental manganese and aluminum oxide: 3mno2+4al→3mn+2al2o3part awhat mass of

al is required to completely react with 30.0 g mno2?
Chemistry
1 answer:
Oxana [17]4 years ago
7 0
<span>12.4 g First, calculate the molar masses by looking up the atomic weights of all involved elements. Atomic weight manganese = 54.938044 Atomic weight oxygen = 15.999 Atomic weight aluminium = 26.981539 Molar mass MnO2 = 54.938044 + 2 * 15.999 = 86.936044 g/mol Now determine the number of moles of MnO2 we have 30.0 g / 86.936044 g/mol = 0.345081265 mol Looking at the balanced equation 3MnO2+4Al→3Mn+2Al2O3 it's obvious that for every 3 moles of MnO2, it takes 4 moles of Al. So 0.345081265 mol / 3 * 4 = 0.460108353 mol So we need 0.460108353 moles of Al to perform the reaction. Now multiply by the atomic weight of aluminum. 0.460108353 mol * 26.981539 g/mol = 12.41443146 g Finally, round to 3 significant figures, giving 12.4 g</span>
You might be interested in
The reaction below has an equilibrium constant kp=2.2×106 at 298 k. 2cof2(g)⇌co2(g)+cf4(g) calculate kp for the reaction below.
AnnZ [28]

<span>I believe the correct 2nd reaction is:</span>

cof2(g)⇌1/2 co2(g)+1/2 cf4(g)

where we can see that it is exactly one-half of the original

Therefore the new Kp is:

new Kp = (old Kp)^(1/2)

new Kp = (2.2 x 10^6)^(1/2)

<span>new Kp = 1,483.24 </span>

8 0
4 years ago
Read 2 more answers
which term is used when sugar is completely dissolved in water                                                                 
GaryK [48]
The term which is used is homogeneous.
when sugar is completely dissolved in the water, the mixture or solution homogeneous, both in same phase and same uniform texture that is liquid.
There two types of mixtures are heterogeneous and homogeneous in different phases.
If sugar is not completely dissolved in water and you see the crystals of sugar in water, then the solution will be heterogeneous.
3 0
4 years ago
What is true if a liquid and a gas are in equilibrium?
MAXImum [283]

Answer:

A - Liquid molecules forming a gas and gas molecules forming a

liquid are equal in number.

Explanation:

A P E X

6 0
3 years ago
Why is iron described as an element
Harrizon [31]
Iron is a type of element because iron is metal and metal is also a mineral
Hoped this helped
5 0
3 years ago
I'm not really sure on how to test if it is a chemical or physical change....
kolezko [41]
Chemical change because it cannot be reversed
4 0
4 years ago
Other questions:
  • Which energy transformation occurs in the core of a nuclear reactor?
    9·2 answers
  • What is the hybridization of bromine in BrO2-?
    14·2 answers
  • What is the charge of an atom after it gains an electron during the formation of a bond?
    13·1 answer
  • Why does the reaction rate decrease as the reaction progresses?
    10·2 answers
  • Calculate the pOH and the pH of a 5.0 x 10-2 M solution of NaOH.
    11·1 answer
  • Short Answer/Essay
    10·2 answers
  • Which two features are used to describe matter?<br> om
    10·1 answer
  • The molecular mass of air, at standard pressure and temperature, is approximately 28.97 g/mol. Calculate the mass of 3.33 moles
    10·1 answer
  • What is white light?
    8·1 answer
  • PLEASE HELP PLEASE HELP PLEASE HELP
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!