The characteristics odour of pineapple is due to ethylbutyrate, a compound containing carbon, hydrogen and oxygen. Combustion of 2.78mg of ethylbutyrate leads to formation of 6.32mg of CO2 and 2.58mg of H2O. (1) what is the empirical formula of the ethylbutyrate. (2) The mass spectrometric analysis of the compound suggests that the molecules mass should be between 100 and 120, what is the likely molecular formula of the compound?

Both josef loschmidt and amedeo avogadro contributed to our understanding of basic molecular numbers, sizes, and reaction ratios. neither scientist discovered “avogadro’s number” in the form we use it today (6.02 x 10 23). still, there’s a controversy over the name. research the contributions from these two scientists and read about how avogadro’s number got its name. briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid rationale for your case in naming the number.

Select the correct location on the image identify the element that humans need to breathe. 2015 er r ights reserved

Match these items with their examples. 1. liquid solution milk 2. solid solution aluminum foil 3. compound soda 4. colloid steel 5. element salt