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semisi caucau
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semisi caucau
Questions (1)
a piece of chalkboard dissolvedin acid solution and the solution bubbled vigorously.The gas caused barium hydroxide solution to
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Answers (3)
5:4=320:x,so 5x=1280 therefore x =256mol of water
in order to solve this problem, the best way is to calculate their mole ratio(O2 and Fe2O3).so that would be mole ratio of O2 and Fe2O3;it would be 3:2=2.50g:x..3X=5 so the mole for fe2o3 is 1.67mol....so u got the mole so find the the mass...formula is
3x-9=2x+8,put the like terms together...therefore 3x-2x=8+9 which equals to...x=17 so Kathy's age now is 17 years old....
