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pantera1 [17]
3 years ago
8

How many neutrons are in calcium nitride

Chemistry
1 answer:
xxTIMURxx [149]3 years ago
8 0

Answer:

20

Explanation:

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Help, I need this quick. Someone please.
timofeeve [1]

Answer:

the answer to that question is d

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3 years ago
!!!Need answer for chem homework ASAP PLS !!!!
stealth61 [152]

Answer:

The answer to your question is: kc = 6.48

Explanation:

Data

             Given                 Molecular weight

CaO =    44.6 g                    56 g

CO₂ =     26 g                       44 g

CaCO₃ = 42.3 g                  100 g

Find moles

        CaO                 56 g ----------------  1 mol

                                 44.6 g --------------   x

                               x = (44.6 x 1) / 56 = 0.8 mol

        CO₂                 44 g -----------------  1 mol

                                26 g ----------------    x

                               x = (26 x 1 ) / 44 = 0.6  moles

        CaCO₃            100 g ---------------   1 mol

                                42.3g --------------    x

                              x = (42.3 x 1) / 100 = 0.423 moles

       

Concentrations

 

        CaO     =    0.8 / 6.5  = 0.12 M

         CO₂    =     0.6 / 6.5 = 0.09 M

        CaCO₃  =   0.423 / 6.5 = 0.07 M

Equilibrium constant =   \frac{[products]}{[reactants]}

Kc = [0.07] / [[0.12][0.09]

Kc = 0.07 / 0.0108

kc = 6.48

7 0
3 years ago
ALSO NEED THIS ANSWERED PRETTY SOON I THINK IK WHAT IT IS BUT NOT SURE HELP!
Illusion [34]

Answer:

I think it's B but I could be wrong so really sorry if I am

3 0
2 years ago
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What is the name for the lowest layer of the atmosphere, which is most influenced by human activities?
bagirrra123 [75]
The Answer Is B Because You Have To Divide The 9
7 0
3 years ago
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Note: Please show all work and calculation setups to get full credit. T. he following may be used on this assignment: specific h
olga55 [171]

Answer:

16974J of energy are required

Explanation:

The energy required is:

* The energy to heat solid water from -15°C to 0°C using:

q = m*S*ΔT

* The energy to convert the solid water to liquid water:

q = dH*m

* The energy required to increase the temperature of liquid water from 0°C to 75°C

q = m*S*ΔT

The first energy is:

q = m*S*ΔT

<em>m = Mass water = 25g</em>

<em>S is specific heat of ice = 2.03J/g°C</em>

<em>ΔT is change in temperature = 0°C - (-15°C) = 15°C</em>

q = 25g*2.03J/g°C*15°C

q = 761.3J

The second energy is:

q = dH*m

<em>m = Mass water = 25g</em>

<em>dH is heat of fusion of water = 80cal/g</em>

q = 80cal/g*25g

q = 2000cal * (4.184J/1cal) = 8368J

The third energy is:

q = m*S*ΔT

<em>m = Mass water = 25g</em>

<em>S is specific heat of water= 4.184J/g°C</em>

<em>ΔT is change in temperature = 75°C-0°C = 75°C</em>

q = 25g*4.184J/g°C*75°C

q = 7845J

The energy is: 7845J + 8368J + 761J =

16974J of energy are required

3 0
2 years ago
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