A parent nucleus decays by emitting a gamma photon, e. g., Tc-99m decays to Tc-99g. Parent and daughter nuclei are: a) isotopes b) isotones c) isobars d) isomers e) combination of 2 or more of the above

How many grams of n2h4 will be consumed by 23 g of n2o4

Select the most likely product for this reaction: koh(aq) + co2(g) – ? k2co3(aq) + h2o(1) k(s) + h2(g) + o2(g) k(s) + co3(9) +h2

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?