Mri or cat scans on the body
Answer:
Suppose that you add 29.2 g of an unknown molecular compound to 0.250 kg of benzene, which has a K f of 5.12 oC/m. With the added solute, you find that there is a freezing point depression of 2.78 oC compared to pure benzene. What is the molar mass (in g/mol) of the unknown compound
Explanation:
The mass of nonvolatile solute added is ---- 29.2g
The mass of solvent benzene is ---- 0.250kg = 250g
The Kf value of benzene is ---- 5.12^oC/m.
Depression in the freezing point of the solution is --- 2.78^oC.
What is the molar mass of the unknown solute?
Substitute the given values in this formula to get the molar mass of unknown solvent:
Hence, the molar mass of unknown solute is --- 215g/mol.
Cells are the basic building blocks of all living things
Answer:
The correct answer is Mn goes from +7 to +2.
Explanation:
The permanganate ion (Mn04-) forming by Oxygen (-2 its oxidation state) and the Mn (+7), throwing the count: +7 + (-2 x4) = -1 (the charge of the ion). Said permanganate ion is reduced in the reaction to Mn2 +.
Answer: Explanation:
Atom means the smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.
<u>Iron</u> means a common, inexpensive metal, often black in color, that rusts, is attracted by magnets, and is used in making steel.