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
Blababa [14]
2 years ago
6

What mass of al is required to completely react with 25.0 grams of mno2?

Chemistry
2 answers:
horsena [70]2 years ago
6 0
Mass of MnO2 = 25 g 
The reaction would be 3MnO2 + 4Al --> 3Mn(s) + 2Al2O3
 Molar mass of Al = 26.982 g/mol
 Molar mass of MnO2 = 54.938 + 2(15.999) = 86.936 g/mol
 Calculating the moles = 25 / 86.936 = 0.2876 mol.
 Mole ratio MnO2 and Al considering the equation = 3 mol of MnO : 4 mol of Al
 Calculating the moles of Al = 0.2876 mol MnO2 x (4 mol of Al / 3 mol of MnO)
 Number of moles of Al = 0.3834
 Getting the mass in grams as asked = 0.3834 mol x 26.982 g/mol = 10.34 grams.
pantera1 [17]2 years ago
6 0
10.34 grams Should be the correct answer
You might be interested in
What electrostatic attraction between____ forms an ionic bond?
lina2011 [118]
Between atoms (one metall and one non metall) form an ionic bond(NaCl)
4 0
2 years ago
Your body is much larger now than it was when you were a baby. What is the cause of this growth? *
masya89 [10]

Answer:c

Explanation:

4 0
3 years ago
Read 2 more answers
How many moles of neon atoms are there in a neon sign that has 2.4 * 20^ 24 atoms of neon? *
Whitepunk [10]

Answer:

4 moles of neon

Explanation:

Given data:

Number of moles of neon = ?

Number of atoms of neon = 2.4×10²⁴ atoms

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen

For given neon atoms:

1 mol =  6.022 × 10²³ atoms

2.4×10²⁴ atoms × 1 mol / 6.022 × 10²³ atoms

0.4×10¹ mol = 4 mol

3 0
3 years ago
How do I round 10.25 to only 3 significant digits
Lady_Fox [76]
10.3 is good the correct rounding of three sig figures

3 0
3 years ago
Why is an earth called natural green house. explain in brief​
crimeas [40]

Answer:

The greenhouse effect is a natural process that warms the Earth's surface. ... The absorbed energy warms the atmosphere and the surface of the Earth. This process maintains the Earth's temperature at around 33 degrees Celsius warmer than it would otherwise be, allowing life on Earth to exist.

8 0
2 years ago
Other questions:
  • Which way does equilibrium shift
    5·1 answer
  • How are each of these seeds most likely spread from place to place
    6·1 answer
  • 3 examples of substance that are soluble in water?
    14·2 answers
  • An unknown acid has a hydronium ion concentration of 0.00352. what is its ph
    13·1 answer
  • A 19.45 gram sample of copper is heated in the presence of excess iodine. A metal iodide is formed with a mass of 58.30 g. Deter
    10·1 answer
  • Suppose you had 2.0158 grams of hydrogen (H2).
    9·1 answer
  • How many formula units make up 25.8g of magnesium chloride (MgCl2)? Express the number of formula units numerically.
    8·1 answer
  • Sebastian watches his cat run out Into the yard, look at a bug, and then run back to the
    12·1 answer
  • What are the similarities and differences between living on Earth versus living in space?
    13·2 answers
  • you are give a bottle that contains 4.59cm3 of a metalic solid .the total mass of the bottle plus solid =35.66g .the empty bottl
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!