If 100 grams of pure water taken from different sources is decomposed by passing electricity, 11 grams of hydrogen and `89` grams of oxygen are always obtained' . Which chemical law is illustrated by this statement ?

If 100 grams of calcium carbonate (whether in the form of marble or chalk) are decomposed completely, then 56 grams of calcium oxide and 44 grams of carbon dioxide are obtained'. Which law of chemical combination is illustrated by this statement ?

11.2 L of oxygen STP and 8 grams of calcium are allowed to react. What volume of which chemical 3 is left unreacted?

A sample of pure water , whatever the source always contains……………… by mass of oxygen and 11.1% by mass of hydrogen.

Assertion: Pure water obtained from different sources always contains hydrogen and oxygen in the ratio of 1 : 8 by mass. Reason: Molecular mass of water is 18.

Four samples of water [H_(2)O] are collected from different sources, Each sample on analysis was found to containsame percentage of oxygen. Which law of chemical combination is demonstrated by the above observation?

Assertion (A): pure water obtained from different states of india always contains hydrogen and oxygen in the ration of 1:8 by mass. Reason (R ): Total mass of reactants and products during chemical change is always the same.

Assertion (A): pure water obtained from different states of india always contains hydrogen and oxygen in the ration of 1:8 by mass. Reason (R ): Total mass of reactants and products during chemical change is always the same.