If n=4 and l=3 how many electrons.

Si una estrella no tiene paralaje medible, ¿qué puedes inferir?

Name the element in group 17, period 2. (periodic table)

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.