In an experiment, 170.9 g of C2H4 was reacted with an excess of O2, 164.1 g of CO2 is produced.

C2H4 (g) + 3 O2(g) → 2 CO2 (g) + 2 H2O (l)

What is the percent yield of this reaction?

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Can someone me with 3 and 4 plz. this is for masteries test.