Which of the following represents a correct chemical formula? Name it.

Antacid are prescribed during acidity. Commercially available antacids consist of magnesium hydroxide [Mg(OH)₂], sugar and flavouring agents. The magnesium hydroxide act as base and form salt and water on reaction with hydrochloric acid of the stomach. The mass of salt and water formed is equal to the combined mass of

In order to verify the law of conservation of mass, we carry out chemical reactions in a closed container, so that

Four students A, B, C and D verified the law of conservation of mass by performing chemical reaction between barium chloride and sodium sulphate. All of them took 107.2 g barium chloride solution and 116.1g of sodium sulphate solution and mixed them in the beaker of mass 150 g. They reported their results as follows:

The correct observation is that of student.

In a chemical reaction 10.6 g of sodium carbonate reacted with 12g of ethanoic acid. The products were 4.4 g carbon dioxide, 1.8 g of water and sodium ethanoate. The mass of sodium ethanoate formed is