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The element X has three naturally occurring isotopes. The isotopic masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is ________ amu.             Isotope Abundance (%) Mass 164X 30.60 159.37 164X 15.79 162.79 164X 53.61 163.92  

How many electrons, protons, and neutrons are present in the following isotopes  protons: [a], neutrons: [b], electrons: [c] 

How many grams of hydrogen gas would be produced when 6.0 grams of magnesium react with excess of an acid?   Mg + 2 HCl → MgCl2 + H2    

How many grams of water will be required to completely react with 1.00 mol of CaO according to the following reaction?   CaO + H2O → Ca(OH)2  

The following reaction: LiOH + HCl → LiCl + H2O, is an example of

How many moles of NH3 will be produced when 1.60 mol of N2 react with excess of hydrogen gas according to the following reaction?   N2 + 3 H2 → 2 NH3

What mass of sodium hydroxide will be required to neutralize completely 1.60 × 1023 molecules of HCl?  

When solutions of an acid and a base are reacted, the products are    

How many molecules are present in 0.500 mol of CH4?  

How many grams of oxygen are present in 76.8 g of CO2?