Depends have you been taught that batteries store chemical energy then it’s chemical to light
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Answer:</h3>
0.162 M
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Explanation:</h3>
We are given;
- Initial concentration as 18.0 M
- Initial volume of the solution is 18.0 mL or 0.018 L
- Final volume of the solution is 2.0 L
We are required to find the final concentration or molarity.
- When a solution is diluted by adding more solvent, the concentration of the solution decreases.
- To find the final concentration of the dilute solution we use the dilution formula, C1V1 = C2V2.
Rearranging the formula;
C2 = C1V1 ÷ V2
= (18 M × 0.018 L) ÷ 2.0 L
= 0.162 M
Therefore, the final concentration will be 0.162 M
For an equation to be balanced, the number of atoms of the reactants and products have to be equal. Therefore, (3) <span>3Fe3++ Al → 3Fe2++ Al3+</span> is the balanced equation, as you have 3 Fe atoms and 1 Al atom on both sides. The exponents are just the charges of the elements, and you don't need to care about these numbers in order to balance a chemical equation.
Hope this would help :))
Answer:
Mass of KNO3= 10g
Molar mass of KNO3 = 101.1032g/mol
Volume = 250ml = 0.25L
No of mole on of KNO3 = mass of KNO3/Molar mass of KNO3
no of mole of KNO3 = 10/101.1032
No of mole of KNO3 = 0.09891
molarity of KNO3 = no of mole of KNO3/Vol (L)
Molarity = 0.09891/0.25 = 0.3956M
Molarity of KNO3 = 0.3956M
As aluminium loses 12 moles of electrons oxygen gain 12 moles of electrons.
Explanation
4Al + 3 O2→ Al2O3
first write the ions of Aluminium and oxygen
that is, Aluminium ion is = Al^3+
oxygen ion is = O^2-
therefore one atom of Al loses 3 electrons moles while
one atom of O gain 2 electrons moles
from equation above there a total of number of Al atom are 4 =( 1 x4=4) atoms while
Oxygen atoms are 6= ( 3 x2=6) atoms
therefore the total number of Moles of Al lost is = 3 x 4 = 12 moles of electrons
total number of moles of O gained = 2 x6 = 12 moles of electrons
