a) A 25.3 mg sample of sodium carbonate is present in a container. i) Write the formula of sodium carbonate: (Write numbers on same level as letters-no subscripts or superscripts.) 1000 mg = 1g 1 mol = 6.022 x 1023 particles ) i) calculate the # of O atoms in the sample: 10 O atoms ii) calculate the # of Na atoms in the sample: 10 Na atoms b) i) Write the formula of potassium phosphate: (Write numbers on same level as letters-no subscripts or superscripts.) ii) Calculate the mass % of K in potassium phosphate (MM = 212.27 g/mol): % (to 4 SFs) iii) Calculate the mass % of O in potassium phosphate (MM = 212.27 g/mol): % (to 4 SFs)