Is answer correct or not? (about chemical calculation)
Calculate the number of moles of oxalic acid and the molarity of the oxalic acid solution.
Molar mass of H2C2O4•2H2O 126.07 g/mol
Mass of H2C2O4•2H2O 1.5232g
1) No. of moles of H2C2O4•2H2O _______?________ mol
Volume of H2C2O4•2H2O solution 250.0 mL
2) Molarity H2C2O4 standard solution _____?____M
1) Answer is 1.5232 x 1 mol /126.07 g/mol = 0.012082 mol
2) Answer is 0.012082 / 0.25L = 0.048328 M
I didn't exactly understand the "standard solution" What is mean?
My answer is correct or not?
and sometimes, I don't know how many decimal places I have to write down. How to write the answer correctly form?