semisi caucau

This page lists questions and answers that were posted by visitors named semisi caucau.

Questions

The following questions were asked by visitors named semisi caucau.

a piece of chalkboard dissolvedin acid solution and the solution bubbled vigorously.The gas caused barium hydroxide solution to form a white precipitate.what is the gas given off?what is the white precipitate?write a chemical equation for the formationof...

Answers

The following answers were posted by visitors named semisi caucau.

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....

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 m...

5:4=320:x,so 5x=1280 therefore x =256mol of water