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Otrada [13]
4 years ago
9

If a sample of Fe2S3 contains 1.25x10ˣ15 iron atoms what is the mass in grams?

Chemistry
1 answer:
VMariaS [17]4 years ago
4 0

Answer:

mass = 0.00000043189g

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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]

Answer:

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
35.47 + 10.1 with the proper number using significant figures
9966 [12]

Answer:

35.47+10.1 is 45.57, I hope that helped nc I'm new to this app and yea.

6 0
3 years ago
Which property of isotopes makes them suitable for determining the dates of ancient artifacts?
shusha [124]
The rate of decay of the isotope
8 0
3 years ago
A chemist burns a serving of peanuts in a calorimeter and sees that 150000 j of energy is released what should the nutritional l
Sergio [31]

We know that

1 calorie = 4.184 Joules

so let us convert the joules to calories first

1 Joule = 1 / 4.184 Cal

150000 = 150000 / 4.184 Cal = 35850.86 Cal

Now in case of food articles

one calorie = 1 Kcal

Therefore on food label it will = 35.851 Cal

5 0
4 years ago
Hospital patients are administered oxygen from an pressurized
VashaNatasha [74]

Answer:

32000atm

Explanation:

Using Boyle's law equation;

P1V1 = P2V2

Where;

P1 = initial pressure (atm)

P2 = final pressure (atm)

V1 = initial volume (

V2 = final volume (L)

According to the question below:

P1 = 160.0 atm

P2 = 3.0 atm

V1 = 600L

V2 = ?

Using P1V1 = P2V2

160 × 600 = 3 × V2

96000 = 3V2

V2 = 96000/3

V2 = 32000atm

5 0
3 years ago
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