Round the following number to 2 significant digits:

1.9999

If a reaction has g of -136kj at 110°c, will it be spontaneous at this temperature (110°c)? yes or no

Stage in which a star’s outer layers have started to cool and grow outward?

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