Answer:
The answer to your question is 0.92 atm
Explanation:
Data
Atmospheric pressure = 27.6 inHg
Atmospheric pressure = ? atm
Process
1.- Convert inHg to cmHg
1 in Hg ------------------- 2.54 cm
27.6 inHg ----------------- x
x = (27.6x 2.54) / 1
x = 70.1 cm
2.- Convert cmHg to mmHg
2.54 cm ----------------- 25.4 mmHg
70.1 cm ---------------- x
x = (70.1 x 25.4)/2.54
x = 701 mmHg
3.- Convert mmHg to atm
760 mmHg ------------- 1 atm
701 mmHg ------------- x
x = (701 x 1)/760
x = 0.922 atm
2H2O -> 2H2 + O2
Stoichiometric ratio:
2 : 2 : 1
H2O : O2
2 : 1
Mass of 1 mol of H2O = [(2 x 1) + 16] g = 18g
18g of H2O = 1 mol of H2O
90g of H2O = 90g x 1 mol / 18g
= 5 mol of H2O
2 mol of H2O : 1 mol of O2
5 mol of H2O : 5/2 mol of O2
1 mol of O2 = 22.4 L of O2
5/2 mol of O2 = 5/2 mol x 22.4 L / 1 mol
= 56 L of O2
No, pure cocoa powder is not very soluble. A hot cocoa mix will dissolve well under warm temperatures.