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Sliva [168]
4 years ago
9

Convert the following to moles 5.70 grams of ZrF4

Chemistry
1 answer:
marysya [2.9K]4 years ago
5 0
5.70 g ZrF4* (1 mol ZrF4/ 167.2 g ZrF4)= 0.0341 mol ZrF4.

The final answer is 0.0341 mol ZrF4~
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Galvanized nails are iron nails that have been plated with zinc to prevent rusting. The relevant reaction is
fomenos

Answer:

1.18 × 10⁷ c

Iron is the anode and zinc is the cathode.

Explanation:

Let's consider the reduction of Zn²⁺.

Zn²⁺(aq) + 2 e⁻ ⇒ Zn(s)

<em>How many coulombs of charge are needed to produce 61.2 mol of solid zinc?</em>

<em />

We can establish the following relations:

  • When 2 moles of electrons circulate, 1 mol of Zn is produced.
  • 1 mole of electrons have a charge of 96468 c (Faraday's constant).

Then, for 61.2 mol of Zn:

61.2molZn.\frac{2mole^{-} }{1molZn} .\frac{96468c}{1mole^{-}} =1.18 \times 10^{7} c

<em>Identify the anode and cathode when plating an iron nail with zinc.</em>

The anode is where the oxidation takes place and the cathode is where the reduction takes place.

Anode (oxidation): Fe(s) ⇒ Fe²⁺(aq) + 2 e⁻

Cathode (reduction): Zn²⁺(aq) + 2 e⁻ ⇒ Zn(s)

3 0
3 years ago
The movement of electrons causes:
ki77a [65]
Your answer is B ;) the movement of electrons cause electrical energy :)


4 0
3 years ago
What is the pOH of a 1 x 10^-8 M solution of HNO3?
Sedaia [141]

Explanation:

to find POH u need PH first

so ph=-log(h3o)

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ph =  -  log(1 \times  {10}^{ - 8} )  \\  \\ ph = 8 \\ ph + poh =14 \\ poh = 14 - 8 \\ poh = 6

8 0
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Fluorine has an atomic number 9. It is in period 2 of the periodic table. The diagram shows the electron dot diagram of a fluori
jek_recluse [69]

Fluorine has C seven valence electrons.

Valence electrons are the electrons that are found on the outer shell of an atom that are capable of participating in chemical reactions. The easiest way to figure out how many valance electrons Fluorine has would be to look it up in a periodic table and notice that it a group 7 element and therefore has 7 valence electrons.

The other way to tell that Fluorine has 7 valence electrons is to notice that an element with an atomic number of 9 has 9 electrons. The electronic configuration of elements has the first 2 electrons go on the first shell or energy level 1s^2 , the leaving the next 7 to go to the second shell 2s^22p^5 which can take up to 8 electrons.

This means that Fluorine has 7 seven valence electrons.

6 0
3 years ago
Read 2 more answers
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Answer:

They curve in opposite directions because of one reason(s) latitude and longitude. Because these are different places, they will experience different weather conditions based on how far they are from sea level.

Explanation:

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