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alisha [4.7K]
3 years ago
15

What is the approximate mass of iron

Chemistry
1 answer:
german3 years ago
3 0

Answer:

55.845 u

Explanation:

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Deuterium (D or 2H) is an isotope of hydrogen. The molecule D2 undergoes an exchange reaction with ordinary hydrogen, H2, that l
Paladinen [302]

Answer:

Kp_2} =2.0

Explanation:

K_{p1}= 1.8

K_{p2}= ???

T_1= 298K

T_2 = 415 K

\delta H = 0.64 kJ/mol = 640 J/mol

R = 8.314 J/mol.K

Using Van't Hoff Equation:

In (\frac{Kp_2}{Kp_1} )=(-\frac{DH}{R} *(\frac{1}{T_2}-\frac{1}{T_1}  )

In (\frac{Kp_2}{1.8} )=(-\frac{640}{8.314} *(\frac{1}{415}-\frac{1}{298}  )

In (\frac{Kp_2}{1.8} )=0.072827

(\frac{Kp_2}{1.8} )= e^{0.0728727}

\frac{Kp_2}{1.8} =1.075593605

Kp_2} =1.075593605*1.8

Kp_2} =1.936068489

Kp_2} =2.0

3 0
4 years ago
Read 2 more answers
If an ocean current is moving northward from Antarctica and up the coast of Africa, the climate of the coastal land would be....
Illusion [34]

Answer:

I would say a cooled

Explanation:

because yeah it's going to be cold when it travels from Antarctica but then it's going on towards Africa and yeah the water is going to get warmth but it's going to cool the land of Antarctica because it's so dry and hot and humid but the water is going to be more warmed because Antarctica the water is freezing so you're trying to ask the temperature of the water it'd be more warm if you're trying to ask kind of like the temperature of the land it would be cooled

8 0
3 years ago
How many grams of calcium chloride would you need to make 1 L of solution containing 5 ppm calcium (Ca)?
Tresset [83]

Explanation:

The given data is as follows.

           Volume = 1 L,    Concentration of Ca = 5 ppm or 5 mg/L

As 1 mg = 0.001 g so, 5 mg /L will be equal to 0.005 g/l. Molar mass of calcium is 40.078 g/mol.

Hence, calculate molarity of calcium as follows.

           Molarity of Ca = \frac{\text{given concentration}}{\text{molar mass}}

                                  = \frac{0.005 g/l}{40.078 g/mol}

         Molarity of Ca = 1.25 \times 10^{-4} M

Hence, molarity of CaCl_{2} is 1.25 \times 10^{-4} M. Since, volume is same so, moles of calcium chloride will be 1.25 \times 10^{-4} mol.

Thus, we can conclude that mass of CaCl_{2} will be as follows.

             1.25 \times 10^{-4} \times 110.984       (molar mass of CaCl_{2} = 110.984 g/mol)

               = 0.0138 g

Thus, we can conclude that mass of CaCl_{2} is 0.0138 g.

4 0
3 years ago
A few drops of food coloring are put into two containers of water. Observations are shown in the table. Which statement best exp
Svet_ta [14]

Answer:

C

Explanation:

Increasing temp causes increased molecule movment in sample 2

6 0
3 years ago
A liquid is cooled during an investigation causing it solidify.Which of the following most likely occurred? A.Absorption of heat
mojhsa [17]

Answer:

C. A physical change.

Explanation:

A liquid is cooled during an investigation causing it solidify.Which of the following most likely occurred?

A. Absorption of heat. NO. Heat was released.

B. A chemical change. NO. It was a physical change

C. A physical change. YES. The physical change is called solidification.

D. Formation of a new compound. NO. This would be a chemical change.

6 0
3 years ago
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