Which electron configuration represents the electrons in an atom of sodium in the ground state at STP? 1
2-8-1
2.
2-7-2
3.
2-8-6
4.
2-7-7

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

Imagine that twenty i.u.’s of enzyme z were catalyzing the above reaction for one minute, under vmaxconditions, in a 3.00 ml assay volume. the assay is buffered with 20 mm phosphate buffer, ph 7.60. what will the ph be at the end of that one minute?

For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants. 4al(s)+3o2(g)→2al2o3(s) a) 1 molal, 1 mol o2 b) 4 molal, 2.6 mol o2 c) 16 molal, 13 mol o2 d) 7.4 molal, 6.5 mol o2