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TiliK225 [7]
3 years ago
11

Carbon burns in the presence of oxygen to give carbon dioxide. Which chemical equation describes this reaction? carbon + oxygen

+ carbon dioxide carbon + oxygen → carbon dioxide carbon dioxide → carbon + oxygen carbon dioxide + carbon → oxygen NextReset
Chemistry
2 answers:
zmey [24]3 years ago
8 0

Answer: CO2

Explanation:

frutty [35]3 years ago
6 0
C (solid) + O2 (gas) -> C02 (gas)

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This problem could be solved easily using the Henderson-Hasselbach equation used for preparing buffer solutions. The equation is written below:

pH = pKa + log[(salt/acid]

Where salt represents the molarity of salt (sodium lactate), while acid is the molarity of acid (lactic acid). 

Moles of salt = 1 mol/L * 25 mL * 1 L/1000 mL = 0.025 moles salt
Moles of acid = 1 mol/L* 60 mL * 1 L/1000 mL = 0.06 moles acid
Total Volume = (25 mL + 60 mL)*(1 L/1000 mL) = 0.085 L

Molarity of salt = 0.025 mol/0.085 L = 0.29412 M
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