Which is an example of a chemical change? a)mixing of poster colors? b)formation of clouds? c)metal corroding in salt water? d)sugar dissolving in water? e)separating salt from seawater

Problem page gaseous ethane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . if of water is produced from the reaction of of ethane and of oxygen gas, calculate the percent yield of water. be sure your answer has the correct number of significant digits in it.

How many neutrons does a atom of cobalt have?

Express the following number in scientific notation. 0.026890 =