9. Describe two ways in which you can conserve and recycle lab resources.
I

According to the tide table below what time of day will the highest tide occur?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

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