Calculate the amount of copper (in moles) in a 29.4 g pure copper sheet.

Number of moles = 0.4626 (Approx)

Explanation:

Given:

Mass of copper = 29.4 gram

Find:

Number of moles

Computation:

Atomic mass of copper = 63.546

Number of moles = Mass / Atomic mass

Number of moles = 29.4 / 63.546

Number of moles = 0.4626 (Approx)

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

cytokinesis is the splitting of a cell membrane to form 2 identical daughter cells. it's similar to mitosis as both cells have identical copies of dna and cytokinesis is a step in the mitotic cycle.