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kkurt [141]
4 years ago
5

What effect does the mno2 catalyst have on the rate of evolution of o2 gas?

Chemistry
2 answers:
omeli [17]4 years ago
5 0
<span>You did not specific if the evolution of O2 gas comes from the decomposition of hydrogen peroxide. But I assume it is , since MnO2 is commonly used to increase the rate of hydrogen peroxide decomposition to water and oxygen. 
Thus MnO2 increases the rate of O2 gas evolution, but the amount of O2 gas evoluted is the same. It does so by providing an alternative reaction pathway via a transition state with lower activiation energy.</span>
noname [10]4 years ago
5 0

Answer:

As explained below.

Explanation:

  • MnO 2 Is a manganese oxide that is commonly found in nature in the form of a pyrolusite mineral these oxides have a high activity of exothermic decomposition.
  • Being a most basic solution it slowly decomposed to form the oxygen gas and water and water levels keep on decreasing and the amount of oxygen gas increases.
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cluponka [151]

Answer:

When atom undergoes the alpha emission the original atom convert into the atom having mass number less than 4  and atomic number 2 less than the starting atom.

Explanation:

Alpha radiations are emitted as a result of radioactive decay. The atom emit the alpha particles consist of two proton and two neutrons. Which is also called helium nuclei. When atom undergoes the alpha emission the original atom convert into the atom having mass number less than 4  and atomic number 2 less than the starting atom.

Properties of alpha radiation:

Alpha radiations can travel in a short distance.

These radiations can not penetrate into the skin or clothes.

These radiations can be harmful for the human if these are inhaled.

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₉₂U²³⁸   →   ₉₀Th²³⁴  + ₂He⁴  + energy

5 0
4 years ago
Which contains more molecules: 1.00 mol, H2O2, 1.00 mol C2H2, or 1.00 mol CO?
xenn [34]
A mole of any chemical compound contains the same number of molecules - about 6.022 × 10²³ molecules.
So, 1 mole of H₂O₂, 1 mole of C₂H₂ and 1 mole of CO contain the same number of molecules.
7 0
3 years ago
Arrange the following set of atoms in order of decreasing atomic size: Sn, I, Sr
vampirchik [111]
Atomic size
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3 0
4 years ago
Camilla believes that Earth's crust is evenly thick all around the globe, Maclaya thinks that Camilla is wrong, but doesatt know
xenn [34]

Answer:Macaya (floruit 1802), was a Kongolese-born Haitian revolutionary military leader. Macaya was one of the first black rebel leaders in Saint-Domingue to ally himself with the French Republican commissioners Sonthonax and Polverel. He helped to lead forces that recaptured Cap-Français on behalf of the French Republicans.

Macaya was born in west-central Africa, probably in the Kingdom of Kongo, and taken to the French colony of Saint-Domingue as a slave. After the outbreak of the 1791 slave rebellion in northern Saint-Domingue, Macaya became a lieutenant of an elderly rebel commander named Pierrot. Pierrot's rebel forces were based in the hills outside of Le Cap (Cap Francaise), near Bréda plantation by 1793.

Explanation:

7 0
3 years ago
How many grams of h2 are needed to react with 48 grams of o2, given the reaction: 2 h2 (g) + o2 (g) --&gt; 2 h2o (l)?
photoshop1234 [79]
1.Calculate the number of mole of O2: 48/32=1.5 mol
2.Calculate the number of mole of H2 by mole ratio: 1.5 x 1/2=0.75 mol
3.Calculate the answer:
0.75 x 2=1.5g
5 0
3 years ago
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