Answer:
2
Explanation:
The balanced chemical equation for this reaction is:
2Na + K2S → 2K + Na2S
Meaning the coefficient for potassium (K) is 2.
Answer:
3.0 atm is correct
Explanation:
303,900 pa = 2.999259 atm
303,900 pa = 2279.4371 mmHg
Acrylic is the synthetic fibre feels like wool and used as a substitute for wool
[OH-] = √(Cs×Kw)/Ka
[OH-] = √(0,135×10^-14)/1,8×10^-5
[OH-] = √0,075×10^-9 = √75×10^-12 = 8,66×10^-6
pOH = -log[OH-]
pOH = -log[8,66×10^-6]
pOH ≈ 5,0625
pH + pOH = 14
pH = 14-5,0625
pH = 8,9375
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