Fill in the blank. 2C8H18 + 25O2 → + 18H2O a
8 C2O

b
12 CO2

c
16 CO2

d
12 CO

gravity causes stares to cluster i think so

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%

what is the question here. i think you messed up.

ok whats the question if not i cannot you i need question and need a thing to answer