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
spayn [35]
3 years ago
8

Hard question!

Chemistry
1 answer:
sergey [27]3 years ago
6 0

Answer:as below

Explanation:Zn(NO3)2 (aq) + 2 NaOH (aq) —> Zn(OH)2 (ppt) + 2NaNO3

Zn++ + 2NO3- + 2Na++ + 2OH- —> 2NO3- + 2Na+ + Zn(OH)2

Zn++ + 2OH- —> Zn(OH)2

spectator ions are Na, NO3

You might be interested in
The overall equation for the electrolysis of aluminium oxide is:
Alex Ar [27]

941539.2 g of mass of oxygen is produced when 2000 kg of aluminium oxide is completely electrolysed.

<h3>What is electrolysis?</h3>

Electrolysis is the process by which electric current is passed through a substance to effect a chemical change.

The mass of aluminium oxide Al₂O₃ = 2000 kg = 2000 000 g

Molar mass of Al₂O₃ = 101.96 g/mol

no of moles = \frac{mass }{ molar \;mass}

no of moles of Al₂O₃ =  \frac{2000 000 g}{101.96 g/mol}

no of moles of Al₂O₃ = 19615.4 mol

From the reaction:

4Al + 3O₂  ⇒  Al₂O₃

To determine the moles of O₂ in Al₂O₃:

Then;

19615.4 mol X \frac{3}{2} mol of O₂ = 29423.1

The mass of oxygen now = 29423.1  × 32 g

= 941539.2 g

Hence,  941539.2 g of mass of oxygen is produced when 2000 kg of aluminium oxide is completely electrolysed.

Learn more about electrolysis here:

brainly.com/question/18734579

#SPJ1

6 0
2 years ago
How do nonnumeric, or conceptual problems, differ from numeric problems
Andru [333]
<span>Nonnumeric, or conceptual problems, differ from numeric problems in a sense that solutions to conceptual problems do not involve or need calculations. It just need your knowledge on that specific subject and you just have to analyze the question and understand it to answer correctly.</span>
5 0
3 years ago
Read 2 more answers
What is the molarity of 0.65 mol NaF dissolved in a total volume of 0.50 liters?
arsen [322]

Answer:

1.3 M

Explanation:

The question asks to calculate the molarity of a solution.

We have to use the following equitation:

Molarity = # moles / 1 lt of solution

In this case we have a solution composed of 0.65 mol of NaF diluted in a total volume of 0.5 lt. We will have to do the following cross multiplication solving for x:

0.65 mol NaF / 0.5 lt = x mol NaF/ 1 lt

x = 1.3 mol NaF / 1 lt = 1.3 M

5 0
3 years ago
From which sublevel are electrons removed when a zn atom in the ground state is oxidized?
Vesnalui [34]

Answer:

4s2

Explanation:

The electronic configuration of zinc in the ground state of the atom is 1s22s22p6 3s23p63d104s2. It can be written in a condensed form by showing the inert gas core as follows; [Ar] 3d¹⁰ 4s².

Zinc has a pseudo inert gas configuration when the 4s electrons are removed during oxidation. Hence this sublevel is usually affected when zinc atoms are oxidized according to the scheme;

Zn---->Zn^2+ + 2e-

5 0
3 years ago
A buffer is prepared by dissolving 0.80 moles of NH3 and 0.80 moles of NH4Cl in 1.00 L of aqueous solution. If 0.10 mol of NaOH
Vikki [24]

Answer:

a. 10.54

Explanation:

reaction is

NH₃ +  NaOH   -----------------NH₄Cl + H₂O

0.10 mol NaOH will consume 0.10 mol NH₃ thereby decreasing the initial amount of moles NH₃ and increasing that of NH₄Cl

mol NH₃  = 0.80 - 010 = .70

mol NH₄Cl = 0.80 + .10 = 0.90

pH = pKₐ + log (( NH₃/NH₄Cl))

pH =  9.26 + log (( 0.90 + 0.70)) = 9.26 + 0.11 = 10.54

7 0
3 years ago
Other questions:
  • Consider the oxidation of sodium metal to sodium oxide described by the balanced equation: 4 na + o2 ? 2 na2o. if 2.55 mol of so
    13·1 answer
  • Which of the following would most likely contain a fossil?
    13·1 answer
  • Help me. Dmskdjjddjjcjcfjfjgjghhffufuf
    15·1 answer
  • In most mirrors, the virtual image appears to come from behind the mirror. True False
    5·1 answer
  • The process by which CO2 gas releases heat energy to become dry ice is called :
    13·1 answer
  • imagine that a classmate is quizzing you on the structure of an unknown element. all she can tell you is what the atomic mass is
    10·1 answer
  • Difference between Aluminum and Duralumin​
    12·1 answer
  • Pls help plsssssssss
    8·2 answers
  • Which is a gas at room temperature A.aluminum B.nitrogen C.potassium D.sodium
    6·1 answer
  • A radioactive isotope has a half-life of 2 minutes. How many total minutes will it take for 100-g of the isotope to get to just
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!