- Number of electron groups in h2o?

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Write a balanced equation for the redox reactoin below using the smallest whole number coefficients.? Heat of a solution/ heat of a reaction. No idea what is going on !? What is the value of x when 32.2g of Na2SO4·xH2O are heated leaving 14.2g of anhydrous Na2SO4? Mr (H2O) = 18; Mr (Na2SO4) = 142.? What are some chemistry research topics? How many milliliters of a 1.00 M solution of NaCl are required to obtain 7.13 g of NaCl?