1. __FeS+__HF=__H2S+__FeF2 2. __Al+__HBr=__AlBr3+__H2 3. __Fe+__O2=__Fe2O3 4. __Ag+__O2=__Ag2O 5. __Ca(NO3)2+__NaOH=__Ca(OH)2+__NaNO3 6. __Na+__I2=__NaI 7...

To change the state of a system from lower to higher potential energy , one must therefore supply energy to the system . why ?

Aspirin, C9H8O4 (180.2 g/mol) is prepared by the following reaction:   C7H6O3 + C4H6O3 → C9H8O4 + C2H2O2   If you need to prepare 45 g of aspirin,...

Which has a pressure of 740. mmHg, at a temperature of 25 degree Celsius, in a volume of 250. mL?  I tried figuring this out myself by putting (740)(o.25)/ (0.0821)(298) but I am not getting...

The formula is Mg3N2 + 6H2O---> 3Mg(OH)2 + 2NH3. I tried solving this equation and got 130 grams, then found out it was actually 93 grams but I can't figure out what I must have done wrong...

A. acidic B. basic C. neutral   My guess was acidic because of the H3O, but I wasn't sure because of the -8. I know that it is basic if the number is greater than 7 so I got stuck...

Aluminum sulfate, but my question is is why? At first, I thought the answer was Aluminum (III) Sulfate because of the 3 behind the parenthesis but apparently that isn't correct. Can you explain to...