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UkoKoshka [18]
3 years ago
8

Which reaction will occur?

Chemistry
2 answers:
xz_007 [3.2K]3 years ago
7 0
Only the second 2Fe + Al2O3 = 2Al + Fe2O3. In the first reaction iodide can not replace bromide from the salt. In the third reaction lead can not replace more active zinc metal from the salt.
kati45 [8]3 years ago
3 0

Answer:  2AgNO3+Ni\rightarrow Ni(NO_3)_2+2Ag

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution.

1) 2NaBr+I_2\rightarrow 2NaI+Br_2

As iodine is less reactive than bromine, it will not be able to displace bromine from its salt solution, hence no reaction will occur.

2)2Fe+Al_2O_3\rightarrow 2Al+Fe_2O_3

As iron lies lower in reactivity series, it is less reactive than Aluminium. It will not be able to displace aluminium from its salt and hence no reaction occur.

3) 2AgNO3+Ni\rightarrow Ni(NO_3)_2+2Ag

As nickel lies above in reactivity series, it is more reactive than silver. It will be able to displace silver from its salt and hence reaction will occur.

4) Pb+Zn(C_2H_3O_2)_2\rightarrow Zn+Pb(C_2H_3O_2)_2

As lead lies lower in reactivity series, it is less reactive than zinc. It will not be able to displace zinc from its salt and hence no reaction occur.

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25 g of NH, is mixed with 4 moles of O, in the given reaction:
FromTheMoon [43]

Answer:

a. NH3 is limiting reactant.

b. 44g of NO

c. 40g of H2O

Explanation:

Based on the reaction:

4NH₃(g) + 5O₂(g) → 4NO(g) + 6H₂O(l)

4 moles of ammonia reacts with 5 moles of oxygen to produces 4 moles of NO and 6 moles of water.

To find limiting reactant we need to find the moles of each reactant and using the balanced equation find which reactant will be ended first. Then, with limiting reactant we can find the moles of each reactant and its mass:

<em>a. </em><em>Moles NH3 -Molar mass. 17.031g/mol-</em>

25g NH3*(1mol/17.031g) = 1.47moles NH3

Moles O2 = 4 moles

For a complete reaction of 4 moles of O2 are required:

4mol O2 * (4mol NH3 / 5mol O2) = 3.2 moles of NH3.

As there are just 1.47 moles, NH3 is limiting reactant

b. Moles NO:

1.47moles NH3 * (4mol NO/4mol NH3) = 1.47mol NO

Mass NO -Molar mass: 30.01g/mol-

1.47mol NO * (30.01g/mol) = 44g of NO

c. Moles H2O:

1.47moles NH3 * (6mol H2O/4mol NH3) = 2.205mol H2O

Mass H2O -Molar mass: 18.01g/mol-

2.205mol H2O * (18.01g/mol) = 40g of H2O

3 0
3 years ago
Read 2 more answers
How many carbon atoms are in 26-hydrogen alkyne
navik [9.2K]
An alkyne contains four carbon atoms.... so if you do 26 multiplied by 4 it equals 104... I do not know if that’s the answer so I apologize if it’s wrong :,)
5 0
3 years ago
15. An electrically neutral atom consists of 15 neutrons, 13 electrons, and a number of protons. What is its mass number?​
Korvikt [17]

Answer:

28

Explanation:

it states that the atom is neutral, meaning the number of electrons and protons are the same. so if there are 13 electrons, there are 13 protons. And the mass number is neutrons plus protons. So 13+15 is 28

4 0
3 years ago
Read 2 more answers
If scientists want to determine if a skin cream is effective against fighting acne, what would be the independent variable?
lina2011 [118]

Answer:skin cream

Explanation:

the independent variable is the variable that is always changed or manipulated. in this case the skin cream is the independent variable.

6 0
3 years ago
Someone please help me!!!!!!!
Tresset [83]

Answer:

Hydrogen Chloride Gas is heavier than air and sinks to the ground after being released. Firefighters closer to the ground will be subjected to significantly greater concentrations of hydrogen chloride gas than the firefighters walking on top of railcars.

Explanation:

The molar mass of air is 28.97 g/mol. Air is approximately 78% N2, which has a molar mass of 28.014 g/mol and 21% oxygen, which has a molar mass of 32 g/mol; the remaining constituents of air include CO2 and other trace amounts of gases.

The molar mass of HCl is 36.458 g/mol.

Because HCl is heavier than air, it sinks toward the ground, displacing the lighter air.

The height of railway cars is reported to vary between 13.5 ft to 15.5 ft. So firefighters on tank cars are generally above the HCl gas (although localized atmospheric conditions could cause the HCl to move higher up in the air column).

5 0
3 years ago
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