Answer:
292 mL
Step-by-step explanation:
The pressure is constant.
The only variables are volume and temperature, so we can use <em>Charles’ Law.</em>
V₁/T₁ = V₂/T₂ Multiply each side by T₂
V₂ = V₁ × T₂/T₁
V₁ = 250 mL; T₁ = 300 K
V₂ = ?; T₂ = 350 K
V₂ = 250 × 350/300
V₂ = 292 mL
Answer:
The pH can be obtained from the pOH
Explanation:
pH is a number which expresses the acidity or alkalinity of a solution on a logarithmic scale on which 7 is neutral, lower values indicate greater acidity and higher values greater alkalinity. The pH is equal to −log[H^+], where [H^+] is the hydrogen ion concentration in moles per litre.
Similarly, pOH is given by; pOH= −log[OH^-]. Hence, in a question where the concentration of hydroxide ion is given, we apply this formula to first obtain the pOH.
Also, we know that pH + pOH=14. This implies that, pH= 14 - pOH. Thus we obtain the pH of the solution from its hydroxide ion concentration by following all the steps listed above.
The theoretical yield of copper is a 78:32 ratio.
Answer: Dissolving sugar in water
Explanation: The process of cooling something will "remove" energy from any given system, which means decreasing the amount of entropy in the system. Freezing water, cooling a solid or condensing vapor are examples of cooling the given system. Also, the process of dissolution requires energy, it can be mixing with an instrument or the same solubility of sugar, and as you add energy to the system, this increases the entropy.
