An amount of CaO was placed in a test tube, then this sample absorbed an amount of water vapor and was completely transformed into calcium hydroxide. The mass of the tube with calcium oxide was equal to 10.860 grams, and after absorption it was transformed into 11.1499. Calculate the mass of the test tube? {ca = 40)0=16) H=1}
To calculate the mass of the test tube, we need to subtract the mass of the CaO from the total mass after absorption.
Mass of CaO: 10.860 grams
Mass after absorption: 11.1499 grams
Mass of test tube = Mass after absorption - Mass of CaO
= 11.1499 grams - 10.860 grams
= 0.2899 grams
Therefore, the mass of the test tube is 0.2899 grams.