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SCORPION-xisa [38]
1 year ago
7

Use a periodic table to help you answer these questions if needed.

Chemistry
1 answer:
yuradex [85]1 year ago
3 0

Answer:

2 Al and 3 S

Explanation:

Al2S3 so 2 Al and 3 S

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How many atoms are in 12 moles of I. Check your significant figures.
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Explanation:

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5 0
2 years ago
A 96.0 ml volume of 0.25 m hbr is titrated with 0.50 m koh. calculate the ph after addition of 48.0 ml of koh at 25 ∘c.
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KOH is a strong base and HBr is a strong acid and completely dissociates.
The balanced equation for the reaction is;
KOH + HBr ---> KBr + H₂O
Stoichiometry of acid to base is 1:1
The number of KOH moles reacted - 0.50 M / 1000 mL/L x 48.0 mL = 0.024 mol
number of HBr moles reacted - 0.25 M/ 1000 mL/L x 96.0 mL  = 0.024 mol
the number of H⁺ ions are equal to number of OH⁻ ions. 
Then the solution is neutral.
pH of neutral solutions at 25 °C is 7. 
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3 years ago
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2 years ago
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