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
Law Incorporation [45]
3 years ago
8

An electrolysis cell has two electrodes. Which statement is correct? A. Reduction takes place at the anode, which is positively

charged. B. Reduction takes place at the cathode, which is positively charged. C. Reduction takes place at the dynode, which is uncharged. D. Reduction takes place at the cathode, which is negatively charged. E. Reduction takes place at the anode, which is negatively charged.
Chemistry
1 answer:
Nutka1998 [239]3 years ago
3 0

Answer:

D. Reduction takes place at the cathode, which is negatively charged.

Explanation:

In an electrolytic cell there are two electrodes; the cathode and the anode. The anode is the positive electrode while the cathode is the negative electrode. Oxidation occurs at the anode while reduction occurs at the cathode.

At the anode, species give up electrons and become positively charged ions while at the cathode species accept electrons and become reduced.

You might be interested in
Solid iron (III) oxide reacts with hydrogen gas to form iron and water. How many grams of iron are produced when 440.23 grams of
Nookie1986 [14]

When 440.23 grams of iron(III) oxide are reacted with hydrogen gas, the amount of iron produced will be 307.66 grams

<h3>Stoichiometric calculation</h3>

From the equation of the reaction:

Fe_2O_3 + 3H_2 --- > 2Fe + 3H_2O

The mole ratio of iron(III) oxide to produced iron is 1:2.

Mole of 440.23 iron(III) oxide = 440.23/159.69 = 2.76 moles

Equivalent mole of produced iron = 2.76 x 2 = 5.52 moles

Mass of 5.52 moles of iron = 5.52 x 55.8 = 307.66 grams

More on stoichiometric calculations can be found here; brainly.com/question/27287858

#SPJ1

4 0
2 years ago
The diagram shows an electron shell model of a sodium atom.
jeka94
B. The third shell would be empty so that the eight electrons in the second level would be outermost after the atom loses one electron.
3 0
3 years ago
Read 2 more answers
Express the sum of 9.78 g and 7.0 g using the correct number of significant digits.
kvv77 [185]

Answer:

The correct answer is 16.8 g (option C)

Explanation:

Step 1: Data given

9.78 grams + 7.0 grams

Rule significant numbers say:

⇒ Non-zero digits are always significant.

⇒ Any zeros between two significant digits are significant.

⇒ A final zero or trailing zeros in the decimal portion ONLY are significant.

For addition and subtraction, look at the places to the decimal point.  Add or subtract in the normal way, then round the answer to the LEAST number of places to the decimal point of any number in the problem.

9.78 g+ 7.0 g = 16.78 grams

Significant numbers = 1 decimal

16.78 ⇒ 16.8

The correct answer is 16.8 g (option C)

4 0
3 years ago
Read 2 more answers
Please help it is very easy and hard for me to figure out where the words go will give brainliest !!! And this isn't even chemis
GrogVix [38]

Answer:

In the explanation

Explanation:

First of all, make sure you re-read the lesson carefully and memorize the definitions. pls

forces are push and pull.

And just give an example of like someone pushing a sofa into the living room (push).

Another example of pull is pulling a door knob to open a door.

And ANOTHER example can be pushing a tissue box or anything.

Forces can be balanced and unbalanced, that is correct.

When the netforce is equal to 0 then it is balanced, if not then it’s unbalanced.

Balanced which results a netforce equals to 0, there is no change in motion.

Unbalanced which causes in the object's motion changing (For example an tug of war, some guy pulls 10N to the right and the other person 5N to the left, obviously the netforce will be 5N to the right; Unbalanced force)

Last two boxes, maybe add examples as I mentioned? And add another example from ur textbook or something.

8 0
3 years ago
What is the mass, in grams, of 1.50 mol of iron (III) sulfate? Express your answer using three significant figures. mm = nothing
Paul [167]

<u>Answer:</u>

<u>For A:</u> The mass of iron (III) sulfate is 600. g

<u>For B:</u> The moles of ammonium carbonate is 0.07216 moles

<u>For C:</u> The mass of given number of molecules of aspirin is 0.359 grams.

<u>For D:</u> The molar mass of diazepam is 284.7 g/mol

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}      .....(1)

  • <u>For A:</u>

We are given:

Number of moles of iron (III) sulfate = 1.50 mol

Molar mass of iron (III) sulfate = 399.9 g/mol

Putting values in equation 1, we get:

1.50mol=\frac{\text{Mass of iron (III) sulfate}}{399.9g/mol}\\\\\text{Mass of iron (III) sulfate}=(1.50mol\times 399.9g/mol)=600.g

Hence, the mass of iron (III) sulfate is 600. g

  • <u>For B:</u>

We are given:

Mass of ammonium carbonate = 6.935 g

Molar mass of ammonium carbonate = 96.1 g/mol

Putting values in equation 1, we get:

\text{Moles of ammonium carbonate}=\frac{6.935g}{96.1g/mol}=0.07216mol

Hence, the moles of ammonium carbonate is 0.07216 moles

  • <u>For C:</u>

We are given:

Number of aspirin molecules = 1.20\times 10^{21}

Mass of 1 mole of aspirin = 180.16 g/mol

According to mole concept:

6.022\times 10^{23} number of molecules occupies 1 mole

So, 6.022\times 10^{23} number of molecules of aspirin has a mass of 180.16 grams

Thus, 1.20\times 10^{21} number of molecules of aspirin will have a mass of \frac{180.16g}{6.022\times 10^{23}}\times 1.20\times 10^{21}=0.359g

Hence, the mass of given number of molecules of aspirin is 0.359 grams.

  • <u>For D:</u>

We are given:

Moles of diazepam = 0.05570 mol

Given mass of diazepam = 15.86 g

Putting values in equation 1, we get:

0.05570mol=\frac{15.86g}{\text{Molar mass of diazepam}}\\\\\text{Molar mass of diazepam}=\frac{15.86g}{0.05570mol}=284.7g/mol

Hence, the molar mass of diazepam is 284.7 g/mol

6 0
3 years ago
Other questions:
  • In the simulation, open the Micro mode, then select solutions indicated below from the dropdown above the beaker in the simulati
    15·1 answer
  • Which statement best describes salts
    13·2 answers
  • Alkanes are unreactive except in _____ reactions.
    11·1 answer
  • What is the difference between elements, mixtures, and compounds?
    14·1 answer
  • Which of the terms heat of vaporization and heat of fusion refers to condensation and which refers to melting?
    12·1 answer
  • A rectangular solid measures 1.0m by 5.6cm by 2.1mm express its volume in cubic meters
    7·2 answers
  • What type of bonding exists between the carbon atoms to create diamond ?
    15·1 answer
  • 3. Joey pushes on a box with 15N of force to the left, and Annie pushes on the box with 18N of force to
    14·1 answer
  • 6.
    9·1 answer
  • Nén một hỗn hợp khí gồm 3,0 mol nitơ và 7,0 mol hiđro trong một bình kín, phản ứng có sẵn chất xúc tác thích hợp và nhiệt độ của
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!