The following data are obtained in the laboratory: (a) The mass of a clean, dry 250ml beaker
(b) The mass of the same beaker containing an unknown quantity of calcium carbonate
The mass of the calcium carbonate is then obtained by subtracting (a) from (b). Which of the following will ensure the most accurate results?
Measurements should be taken using the same balance
The temperature of the room must remain constant
The barometric pressure should be recorded
O Calculations should be performed in your head