Assignment:
Five mineral samples of equal mass of Calcite, CaCO3 (MM 100.085) had a total mass of 10.1 ± 0.1g. What is the average mass of calcium in each sample? (Assume that the relative uncertainties in atomic mass are small compared the uncertainty of the total mass.)
A solution of HNO3 is standardized by reaction with pure sodium carbonate.
2H+ + Na2CO3→ 2Na+ +H2O + CO2
A volume of 25.77 ± 0.06 mL of HNO3 solution was required for complete reaction with 0.8896 ± 0.0007g of Na2CO3, (FM 105.988 ± 0.001). Find the molarity of the HNO3 and its absolute uncertainty.
Provide complete and step by step solution for the question and show calculations and use formulas.