Which of the following by hypotheses cannot be tested using the scientific method? 1 . if the temperature is increased , the reaction rate of hci and naoh will increase. 2.cold weather causes car tires to deflate . 3. the booing of hiroshima ending world war ll. 4. if students do more homework their grades will improve.

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