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2 years ago

2 Zn + 2HNO2-> 2 ZN(NO2)2 + H2

Chemistry

1 answer:

Aliun [14]2 years ago

8 0

It 6.8 so there you go And this answer is Long because I just need points lol

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Please help, and I’ll thank you.

coldgirl [10]

Answer:

There will be formed 13.82 grams of Fe3O4.

Explanation:

Step 1: the balanced reaction

3 Fe(s) + 4 H2O(l) —— Fe3O4(s) + 4 H2(g)

We see that for 3 moles Fe consumed, there will be consumed 4 moles of H20 and produced 1 mole of Fe3O4 and 4 moles of H2.

Step 2: Calculating moles

⇒mole = mass / Molar mass

⇒moles Fe = 10g / 55.845g/mole = 0.179 moles

⇒moles H2O = 10g / 18g/mole = 0.5556 moles

Since we have 4 moles of H2O consumed for 3 moles of Fe, this means that for 0.179 moles of Fe, we have :

0.179 / 4 *3 = 0.2387 moles of H2O consumed

This means that Fe will be completely consumed and there will remain 0.2387 moles of H2O.

Fe is the limiting reactant and H2O is in excess.

Step 3: Calculate moles of Fe3O4

For 3 moles of Fe consumed, we have 1 mole of Fe3O4 produced.

This means, that for 0.179 moles of Fe consumed, we have 0.179/3 =0.05967 molesof Fe3O4 produced.

Step 4: Calculating mass of Fe3O4

mass= number of moles * Molar mass

mass Fe3O4 = 0.05967 mole * 231.55g/mole = 13.8166 g ≈ 13.82grams of Fe3O4

There will be formed 13.82 grams of Fe3O4.

5 0

3 years ago

ITS FOR AN EXAM GUYS PLEASE

Anastaziya [24]

Answer: A. $Al(s)\rightarrow Al^{3+}(aq)+3e^-$ and $Au^+(aq)+e^-\rightarrow Au(s)$

Explanation:

Galvanic cell is a device which is used for the conversion of the chemical energy produces in a redox reaction into the electrical energy.

The standard reduction potential for aluminium and gold are as follows:

$E^0_{Al^{3+}/Al}=-1.662V$

$E^0_{Au^{+}/Au}=1.83V$

Reduction takes place easily if the standard reduction potential is higher (positive) and oxidation takes place easily if the standard reduction potential is less (more negative).

Here Al undergoes oxidation by loss of electrons, thus act as anode. Gold undergoes reduction by gain of electrons and thus act as cathode.

Anode : $Al(s)\rightarrow Al^{3+}(aq)+3e^-$

Cathode : $Au^+(aq)+e^-\rightarrow Au(s)$

Thus magnesium gets oxidized.

5 0

3 years ago

Atoms in a molecule stick together due to

Nonamiya [84]

Atoms “stick” to each other because they all try to get into a noble gas configuration. Which simply means that they try to reach a amount of electrons equal to noble gasses, this property makes simple atoms like water stable. I hope this helps! Have a great day and stay safe!

7 0

3 years ago

Read 2 more answers

Plants can cause which type of weathering? physical weathering chemical weathering both physical and chemical weathering

Lera25 [3.4K]

Answer:

Both physical and chemical

Explanation:

Plants are able to release toxins and show withering through stages. When a plant has a certain smell, it means it is going through a chemical change, but when you see a plant turning brown, it goes through a physical change.

6 0

2 years ago

3. Describe how photosynthesis is related to respiration.

Paladinen [302]

Answer: Photosynthesis converts carbon dioxide and water into oxygen and glucose. ... Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by-products, and ATP is the energy that is transformed from the process.

6 0

2 years ago