Answer:
now this area isn't my expertise so take this with a grain of salt but I believe its about 91125 g
Explanation:
8 cm is about 45g cube that and its 91125 g
The 0.25 volume in liters of 1.0 M
solution is required to provide 0.5 moles of
(aq).
Calculation,
The Potassium carbonate dissolves as follows:
→ 

The mole ratio is 1: 2
It means, the 1 mole
required to form 2 mole of
(aq).
To provide 0.5 mole of
(aq) = 1 mole ×0.5 mole /2 mole required by
.
To provide 0.5 mole of
(aq) ,0.25 mole required by
.
The morality of
= 1 M = number of moles / volume in lit
The morality of
= 1 M = 0.25 mole/ volume in lit
Volume in lit = 0.25 mole / 1 M = 0.25 mole/mole/lit = 0.25 lit
learn about moles
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The amount of energy required to remove the most loosely bound electron in1 mole of an atom in its neutral gaseous state. Atomic radius is smaller, great nuclear charge (pulling power of protons on less electrons)