FORMULAS: One of the most common uses of spreadsheets is to do math and calculations. In order to do math in a spreadsheet you need to write a FORMULA. Follow the directions in the basics sheet to practice writing equations. Write the answers from your equations separated by commas. (i. E. 5, 8, 13, 21)

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

passing a magnet thought the

mixture , because iron gets attracted to magnet .

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

hi my dude or dudette