Which is more viscous - petrol or diesel?

Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?

Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ