Some salts have water of hydration and are called hydrated salts. A 3.216 g sample of a hydrated salt of NaxByOz · XH2O is heated to drive off the water of hydration. The resulting anhydrous salt, which has a mass of 2.222 g, contains 0.5077 g of sodium,  0.4775 g of boron, and some oxygen. What are the values of x, y, z and X  in the above salt? Write the numerical values for x, y and z  next to the symbol of the element, and  X,  before H2O. Na      B       O       .  H2O

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Q: how do i do this

A: Given,Mass of ND3 = 295.0 mg = 0.295 g   (1 mg = 0.001 g)Moles of ND3 can be calculated as:

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".