A 26.55g sample of a sodium carbonate hydrate with the general formula Na2CO3. X H20 is heated. The mass after heating is 22.65g. What is the coefficient) of water (H20) in the hydrate salt?

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answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

the temperature of the gas, in k, not celsius.