Final answer:
To calculate the mass of 0.172 moles of Cr₄(P₂O₇)₃, multiply the number of moles by the molar mass (176.124 g/mol) to obtain the mass which is approximately 30.293 grams.
Step-by-step explanation:
To calculate the mass of 0.172 moles of Cr₄(P₂O₇)₃, we need to determine its molar mass and then use the formula: mass = moles × molar mass. The molar mass of Cr₄(P₂O₇)₃ can be found by adding the atomic masses of all the atoms in one formula unit of the substance.
Once calculated, the mass of 0.172 moles can be found as follows:
- Calculate the molar mass of Cr₄(P₂O₇)₃.
- Multiply the number of moles (0.172) by the molar mass.
- The resulting product is the mass in grams of the substance.
Given that the molar mass for this compound is 176.124 g/mol, the mass of 0.172 moles of Cr₄(P₂O₇)₃ is:
× 0.172 moles = 30.293 g