Answer: matter and its interaction with energy. Matter has mass and occupies space. A Substance is matter that cannot be separated into other kinds of matter by physical means.
Explanation:
Answer:
171.34 g/mol
Explanation:
Ba molar mass = 137.328 g/mol
O molar mass = 15.999 g/mol * 2 = 31.9980 g/mol
H molar mass = 1.008 g/mol * 2 = 2.0160 g/mol
137.328 + 31.9980 + 2.0160 = 171.3420 = 171.34 g/mol
Basic unit of a chemical element or atoms as a source of nuclear energy
straight out of dictionary
Polar water molecules have a strong attraction for charged ions.
1- First we will get the value of POH from:
PH + POH = 14
and we have PH = 12.01
∴ POH = 14 - 12.01 = 1.99
2- Then we need to get the concentration of OH:
when POH = -㏒[OH]
1.99 = -㏒[OH]
∴[OH] = 0.01 M
now we have the concentration at Equ by subtracting from the initial concentration of OH = 0.24 M
∴ [OH] = 0.24 - 0.01 = 0.23 M
∴ Kb = (0.01)^2 / 0.22977 M
∴ Kb value = 4.4 x 10^-4
