Chemistry Moles vs Molar Solutions: Comparing 0.50 Mole and 0.50 Molar Sodium Carbonate

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0.50 mole sodium carbonate refers to a specific quantity of the substance, while 0.50 molar sodium carbonate indicates a concentration of the solution. Molarity is defined as the number of moles of solute per liter of solution, which means that 0.50 molar sodium carbonate is a solution containing 0.50 moles of sodium carbonate in one liter of solution. The distinction lies in the fact that "moles" is a measure of quantity, whereas "molar" describes concentration. Understanding this difference is crucial for accurate calculations in chemistry.
powergirl

How are 0.50 mole sodium carbonate and 0.50 molar sodium carbonate different?
Can anyone tell me the diff:?
 
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Becuase one is a molarity

Molarity = moles / solution ( litres)

So for molarity it would be the 0.5 / 10 litres...

( molarity is the moles divided by the amount of solution...so they are different units)

Hence moles % molar
 
Thanks for helping me...
 
Thread 'Confusion regarding a chemical kinetics problem'

Thread 'Confusion regarding a chemical kinetics problem'

TL;DR Summary: cannot find out error in solution proposed. [![question with rate laws][1]][1] Now the rate law for the reaction (i.e reaction rate) can be written as: $$ R= k[N_2O_5] $$ my main question is, WHAT is this reaction equal to? what I mean here is, whether $$k[N_2O_5]= -d[N_2O_5]/dt$$ or is it $$k[N_2O_5]= -1/2 \frac{d}{dt} [N_2O_5] $$ ? The latter seems to be more apt, as the reaction rate must be -1/2 (disappearance rate of N2O5), which adheres to the stoichiometry of the...
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