Calculate the Ag+ ion concentration in a saturated solution of Ag2CO3 Ksp=8.1X10^-12
Calculate the pH of a buffer solution that is 1.00 M CH3COOH (acetic acid) and 2.00 M CH3COONa (sodium acetate, a salt) Ka=1.8X-5
The mineral fluorite is composed of CAF2. The molar solubility of calcium fluoride in water is 2.1X106-4
moles/L. what is the Ksp of CaF2?
what ratio of benzoate ion to benzoic acid would be required to prepare a buffer with a pH of 7.20?
Ka(C6H5COOH)=6.5X10-5
Answer:
170 g
Explanation:
Moles of Oxygen gas :
Given, Mass of Oxygen = 80.0 g
Molar mass of Oxygen gas= 31.998 g/mol
The formula for the calculation of moles is shown below:
Thus,
The reaction between Al and O₂ is shown below as:
4Al + 3O₂ ⇒ 2Al₂O₃
From the reaction,
3 moles of O₂ on reaction forms 2 moles of Al₂O₃
1 mole of O₂ on reaction forms 2/3 moles of Al₂O₃
2.5 moles of O₂ on reaction forms (2/3)*2.5 moles of Al₂O₃
Moles of Al₂O₃ = 1.6667 moles
Molar mass of Al₂O₃ = 102 g/mol
Mass = Moles * Molar mass = 1.6667 * 102 g = 170 g
1.5 if you just multiply the number 1.5 times 10 it will give you 15
Answer: solvent will move from the first compartment containing 3% glucose into the second compartment containing 6% glucose.
Explanation: osmosis is defined as the movement of solvent (example water molecules) from a region of lower concentrated solution into the region of more concentrated solution. The first compartment contains less glucose concentration with more solvent. Therefore, solvent will move from the first compartment with less glucose concentration into the second compartment containing 6% glucose concentration to achieve an equalised concentration of solute on both sides of the semi permeable membrane.
