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Romashka-Z-Leto [24]
3 years ago
14

What is the oxidation number of Fe in [Fe (CN)4]2-​

Chemistry
1 answer:
wlad13 [49]3 years ago
3 0

Answer:

numero de oxidacion: 3+2+2-3      

Explanation:

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Adding 5.25 g of to 130 g of water in a coffee-cup calorimeter (with stirring to dissolve the salt) resulted in a decrease in te
xxTIMURxx [149]

Answer:

ΔHrxn =  - 1534.3 J

Explanation:

Given the assumptions and the formula for the change in enthalpy:

ΔHrxn = m x C x ΔT,  where

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               C is the heat capacity 4.2 J/g .K  and,

               ΔT is the change in temperature

we have ,

T₁ = ( 18.1 + 273) K = 291.1 K

T₂ = ( 15.4 +273) K = 288.4 K

ΔHrxn =  135.3 g x 4.2 J/gK x ( 288.4 -291.1 ) K = - 1534.3 J

After verifying our result has the correct unit, the answer is -1534.3 Joules, and the negative sign tells us it is an endothermic reaction decreasing the final temperature.

4 0
3 years ago
What about 50 g of water?<br> I need help what this
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Answer:

3.38  Tablespoons

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50.00 Milliliters

Explanation:

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Hope that helped!!

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