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kvv77 [185]
3 years ago
11

How many moles are in a 62.5-g sample of potassium nitrate (KNO3)?

Chemistry
1 answer:
Reil [10]3 years ago
7 0

Answer:25.3 g of KNO₃ contain 0.25 moles.

Explanation:

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Nonmetals form _________ bonds by sharing electrons to complete their valence shell and increase stability.
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Non metals form ionic bonds by gaining and losing electrons to complete their valence she'll and increase stability. Metals form covalent bonds by sharing electrons.
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Gas chromatography can be useful in determining what about paint?
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The molar mass of NH3 is 17.03 g/mol. The molar mass of H2 is 2.0158 g/mol. In a particular reaction, 0.575 g of NH3 forms. What
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The balanced chemical reaction is:

N2 + 3H2 = 2NH3

 

We are given the amount of ammonia formed from the reaction. This is where we start our calculations.

 

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3 years ago
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A compound made of elements A and B, has a cubic unit cell. There is an A atom at each corner of the cube and an A atom at the c
Lorico [155]

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A₅B₄

Explanation:

Since we have one atom of element A at the center of each face of the unit cell, since the unit cell is a cubic cell, we have 6 faces. Since the atom on the face of the unit cell is shared with another cell, we have half of it in the unit cell is shared So, the number of atoms per face is 1/2 atom/face × 6 faces = 4 atoms on the faces of the unit cell.

Also, we have 1 atom at each corner of the cubic unit cell. Since there are 8 corner in the cubic unit cell. Also, each atom at the corner is shared with 8 unit cells, so we have 1/8 atom per corner. So, the number of atoms per unit cell is 1/8 atom/corner × 8 corners = 1 atoms at the corners of the unit cell.

So, in total we have 4 + 1 = 5 atoms of element A in the unit cell.

Also, there are 4 atoms of element B in the unit cell.

So, the ratio of atoms of element A to element B is 5 : 4.

A:B = 5:4

So, the empirical formula of the compound containing elements A and B is A₅B₄

5 0
3 years ago
Please answer .<br> Which answer choice is correct ? <br> There are four options.
Stolb23 [73]

Answer:

I also think NaOH is the answer since they are all strong electrolytes and NaOH has the highest number

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