Answer:
![Q=1.04kJ](https://tex.z-dn.net/?f=Q%3D1.04kJ)
Explanation:
Hello,
In this case, for latent heat (phase change) we need to consider the enthalpy associated with the involved process, here, melting or fusion; thus, the enthalpy of fusion of copper is 13.2 kJ/mol, therefore, the heat is computed as:
![Q=m\Delta H_{fus}](https://tex.z-dn.net/?f=Q%3Dm%5CDelta%20H_%7Bfus%7D)
Nevertheless, since the given enthalpy is per mole of copper, we need to use its atomic mass to perform the correct calculation as follows:
![Q=5.0g*\frac{1mol}{63.54}* 13.2\frac{kJ}{mol}\\ \\Q=1.04kJ](https://tex.z-dn.net/?f=Q%3D5.0g%2A%5Cfrac%7B1mol%7D%7B63.54%7D%2A%2013.2%5Cfrac%7BkJ%7D%7Bmol%7D%5C%5C%20%5C%5CQ%3D1.04kJ)
Which is positive as it needs to be supplied to the system.
Best regards.
The answer for your question is B!
Answer: I don't know if this helps but here's some information I think might help.
Usually, cells will take between 5 and 6 hours to complete S phase. G2 is shorter, lasting only 3 to 4 hours in most cells. In sum, then, interphase generally takes between 18 and 20 hours. Mitosis, during which the cell makes preparations for and completes cell division only takes about 2 hours. Calculate the percentage of time spent in each phase by counting the total number of cells in each phase (total in interphase, in prophase, etc.) and dividing each by the total number of cells you counted. How do cancer cells differ in total time required for mitosis? Cancer cells produce 117 minutes faster than regular cells. ... Normal cells require 640 minutes during interphase, cancer cells only need 380. For prophase, cancerous cells need 15 minutes less than regular cells. Another hallmark of cancer cells is their "replicative immortality," a fancy term for the fact that they can divide many more times than a normal cell of the body. In general, human cells can go through only about 40-60 rounds of division before they lose the capacity to divide, "grow old," and eventually die 3.
Oceans, they are larger than ponds hence they possess wider exposure with more number of surface molecules.
Explanation:
Chloroform and silver powder react with each other and exchange the ions with each other to form acetylene molecules which are also called ethyne and silver chloride. The molecule C2H2is called acetylene which is a colourless gas with no odour.