-If sulfuric acid (H2SO4) reacts wi th 29 grams of sodium chloride (NaC l), how  many grams of hydrochloric acid (HC l) are produced?  H2SO4   +        NaCl     ­­­­>           HCl    +     Na2SO4 - In the same reaction, how much salt  (NaCl) is needed to produce 4.0 mo les of  sodium sulfate (Na2SO4)? 

- In the same reaction, if you starte d with 100 moles of sulfuric acid ( H2SO4), how  many moles of hydrochloric acid (HC l) could you produce?

What is common about these molecules? a.their atoms are held together by covalent bonds. b.they are all made up of the same two atoms. c.their atoms are held together by ionic bonds. d.they are all made up of oxygen atoms only.

Hot air balloons float in the air because of the difference in density between cold and hot air. in this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. to do this, use the following variables and make these assumptions: the combined weight of the pilot basket together with that of the balloon fabric and other equipment is w. the volume of the hot air inside the balloon when it is inflated is v. the absolute temperature of the hot air at the bottom of the balloon is th (where th> tc). the absolute temperature of the cold air outside the balloon is tc and its density is ďc. the balloon is open at the bottom, so that the pressure inside and outside the balloon is the same. as always, treat air as an ideal gas. use g for the magnitude of the acceleration due to gravity.

What is the atomic number of an atom that has 6 protons