Calcium carbide (CaC2) reacts with water to produce acetylene (C2H2): Balance the reaction CaC2(s) + H2O(g) > Ca(OH)2(s) + C2H2(g) If you produce 13 g of C2H2, how many grams of water were required to react?

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

How many absorptions would you expect to observe in the 13c nmr spectra of the following molecules? a) 3-chloropentane b) cis-4-methyl-2-pentene

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?