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mezya [45]
3 years ago
8

How many atoms are included in a 12 gram sample of carbon 12

Chemistry
1 answer:
Karolina [17]3 years ago
3 0
6.02 x 10^23, basically a mole since the molar mass of carbon is 12
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A 52.0-mL volume of 0.35 M CH3COOH (Ka=1.8×10−5) is titrated with 0.40 M NaOH. Calculate the pH after the addition of 23.0 mL of
Georgia [21]

NaOH reacts with CH3COOH in 1:1 molar ratio to produce CH3COONa 

NaOH + CH3COOH → CH3COONa + H2O 

Mol CH3COOH in 52.0mL of 0.35M solution = 52.0/1000*0.35 = 0.0182 mol CH3COOH 

Mol NaOH in 19.0mL of 0.40M solution = 19.0/1000*0.40 = 0.0076 mol NaOH 

These will react to produce 0.0076 mol CH3COONa and there will be 0.0182 - 0.0076 = 0.0106 mol CH3COOH remaining in solution unreacted . Total volume of solution = 52.0+19.0 = 71mL or 0.071L 

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CH3COONa = 0.0076 / 0.071 = 0.1070M 

pKa acetic acid = - log Ka = -log 1.8*10^-5 = 4.74. 

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pH = pKa + log ([salt]/[acid]) 

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pH = 4.74 + log 0.717 

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pH = 4.60.

7 0
3 years ago
Name two metals alloyed with iron to make stainless steel.
kirill115 [55]
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2 years ago
Differentiate between compounds and mixtures using the particle model of<br> matter.
trasher [3.6K]

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2 years ago
In Lewis Structures, δ (delta) is used in conjunction with _______.
Monica [59]

Answer:

B. Electrical charges of polar covalent bonds

Explanation:

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