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How many oxygen atoms are present in 4.90 mol in Al 203?
Calculate, the mass in grams, the amount of Fe2O3 produced if 14.0 g oxygen is used. (Check the equation below)
O2 + Fe → Fe2O3
unlike in ionic bonding where nonmetals ______ valence electrons to form _________, in covalent bonding, valence electrons are __________.
on the basis of glass formation criteria,can we call glasses as polymers . justify your answer?
what is matter
0.740 moles of a gas occupies 20.0 L at 700.0 mm Hg. What will the volume be when four moles of gas are added to the container and the new pressure is 800.0 mm Hg. Assume no change in temperature
how many molecules are there in 19.99 g of H2O2?
Calculate the molar concentration of hydrogen ions in solution: (a) pH = 2.8 and (b) pOH = 4.2?
Calculate the pH and pOH of a 0.0125 M potassium hydroxide solution.
What is the density of 54.3 % (wt/wt) aqueous NaOH (MW = 40.00) if 17.6 mL of the solution diluted to 2.00 L gives 0.196 M NaOH?
