Which lists the elements in order from least conductive to most conductive?
nitrogen (N), antimony (Sb), bismuth (Bi)
nitrogen (N), bismuth (Bi), antimony (Sb)
antimony (Sb), nitrogen (N), bismuth (Bi)
bismuth (Bi), antimony (Sb), nitrogen (N)
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Ответ:
A
nitrogen (N), antimony (Sb), bismuth (Bi)
Explanation:
Ответ:
Molarity Cl- = 0.074 M
Explanation:
Step 1: Data given
Mass of FeCl3 = 0.40 grams
Molar mass FeCl3 = 162.2 g/mol
Volume = 100 mL = 0.100 L
Step 2: Calculate moles FeCl3
Moles FeCl3 = mass FeCl3 / molar mass FeCl3
Moles FeCl3 = 0.40 grams / 162.2 g/mol
Moles FeCl3 = 0.00247 moles
Step 3: Calculate molarity of FeCl3
Molarity = moles FeCl3 / volume
Molarity = 0.00247 moles / 0.100 L
Molarity = 0.0247 M
Step 4: Calculate molarity of Cl- ions
In 1 mol FeCl3 we have 3 moles Cl-
in 0.00247 moles FeCl3 we have 3*0.00247 = 0.00741 moles Cl-
Molarity Cl- = moles Cl- / volume
Molarity Cl- = 0.00741 moles / 0.100 L
Molarity Cl- = 0.074 M