Which metal sulfides can be precipitated from a solution that is 0.01 M in Mn2 , Zn2 , Pb2 and Cu2 and 0.10 M in H2S at a pH of 1.0

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%

i do not get it   at all

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;