A 114 g sample of ethane (C2H6) burns in excess oxygen. 2C2H6 (g) + 7O2 (g) → 4CO2 (g) + 6H2O (l)
1)What is the theoretical yield of carbon dioxide?
2)If 312 g is actually produced, what is the percent yield?

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

Which of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123