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Dihydrogen dioxide decomposes into water and oxygen gas. Calculate the amounts requested if 1.34 moles of dihydrogen dioxide rea

a_sh-v [17]

Answers:

a. Moles of oxygen formed: 0.670 mol

b. Moles of water formed: 1.34 mol

c. Mass of water formed: 24.1 g

d. Mass of oxygen formed: 21.4 g

Explanation:

Dihdyrogen dioxide is the chemical name for a compound made of two hydrogen atoms and two oxide atoms, i.e. H₂O₂, which is also known as hydrogen peroxide or oxygenated water.

The decomposition reaction of dihydrogen dioxide into water and oxygen gas is represented by the balanced chemical equation:

$2H_2O_2(l)\rightarrow 2H_2O(l)+O_2(g)$

The mole ratios derived from that balanced chemical equation are:

2 mol H₂O₂ : 2 mol H₂O : 1 mol O₂

a. Moles of oxygen formed

Set the proportion using the theoretical mole ratio of H₂O₂ to O₂ and the amount of moles of dyhydrogen dioxide that react:

$2\text{ mol }H_2O_2/1\text{ mol }O_2=1.34\text{ mol }H_2O_2/x$

When you solve for x, you get:

x = 1.34 mol H₂O₂ × 1 mol O₂ / 2 mol H₂O₂ = 0.670 mol O₂

b. Moles of water formed

Set the proportion using the theoretical mole ratio of H₂O₂ to H₂O and the amount of moles of dyhydrogen dioxide that react:

$2\text{ mol }H_2O_2/2\text{ mol }H_2O=1.34\text{ mol }H_2O_2/x$

When you solve for x, you get:

x = 1.34 mol H₂O₂ × 2 mol H₂O / 2 mol H₂O₂ = 1.34 mol H₂O

c. Mass of water formed

Using the number of moles of water calculated in the part b., you calculate the mass of water formed, in grams, using the molar mass of water:

Molar mass of water = 18.015 g/mol

Number of moles = mass in grams / molar mass

⇒ mass in grams = number of moles × molar mass

⇒ mass in grams = 1.34 mol × 18.015 g/mol = 24.1 g

d. Mass of oxygen formed

Using the number of moles of oxygen determined in the part a., you calculate the mass in grams using the molar mass of O₂.

Molar mass of O₂ = 32.00 g/mol

mass = molar mass × number of moles

mass = 32.00 g/mol × 0.670 mol = 21.4 g.

5 0

3 years ago

Why is Pepe the frog sad?!?!?!

Alecsey [184]

Answer:

pepe needs kisses.

Explanation:

you want to kiss pepe. you want to soooo bad.

4 0

3 years ago

Read 2 more answers

Given the reaction below, which is the being reduced? Mg Cl2 Right arrow. Mg2 2Cl– 2CI– CI2 Mg Mg2.

Jlenok [28]

The element that has been reduced in the chemical equation is $\rm Cl_2$ .

The given reaction has been:

$\rm Mg\;+\;Cl_2\;\rightarrow\;Mg^2^+\;+\;2\;Cl^-$

The reaction has been the redox reaction, in which the one of the reactant has been oxidized, and the other has been reduced in the chemical reaction.

<h3>Reduction in the reaction</h3>

The reduction has been defined as the gain of electrons. In the given reaction, the Mg loses 2 electrons and has been converted to the Mg ion.

Thus, Mg has been oxidized in the reaction.

The Cl has been present as the diatomic molecule and with the gain of two electrons from the Mg it has been converted to two chloride ions.

Thus, the element that has been reduced in the chemical equation is $\rm Cl_2$ .

Learn more about reduction, here:

brainly.com/question/14698511

3 0

2 years ago

Can two or more elements be combined chemically to make a new element??

DENIUS [597]

Elements can be chemically combined into compounds, therefore, a compound consists of two or more elements combined, in definite proportions, by chemical means. Compounds may be formed by combining atoms of their constituent elements by ionic bonds or by covalent bond. No but they can be compounds

6 0

3 years ago

Read 2 more answers

Which substance has the lowest pH? NaOH Tap water Lemon juice Blood

Anon25 [30]

Answer:

Lemon juice has lowest pH.

Explanation:

pH is the negative log of hydrogen ion concentration. By increasing the Hydrogen ion concentration pH will decrease.

pH = -log [H⁺]

According to pH scale,

The pH of 7 is consider neutral. The pH below the 7 is consider acidic and above the 7 is basic.

The sodium hydroxide is strongest base because it fully dissociate into ions.

It dissociate to gives the sodium and hydroxyl ions and solution became more basic.

NaOH → Na⁺(aq) + OH⁻(aq)

Its pH is 12. It is also known as caustic soda.

The pH of blood is vary from 7.35 - 7.45. it is slightly alkaline.

The pH of lemon juice is ranging between 2-3.

The pH of tap water is ranging between 6-8.5.

From above given information it can be noticed that lemon juice have lowest pH i.e 2-3. It is acidic, because its pH is less than 7.

5 0

3 years ago