Scrieti configuratia electronica pt urmatoarele elemente: H, He, Be, C, N, O, Ne, Na, Al, Ar.
Precizati pt fiecare element cate straturi, cati orbitali si cati electroni are pe ultimul strat.

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3 -> a2cr(no3)3 + a3ag2so4

What is the percent by mass of oxygen in fe2o3

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products