** Urgent! ** A 8.13-gram sample of NaHCO3 was completely decomposed in an experiment.

2NaHCO3-Na2CO3 + H2CO3

In this experiment, carbon dioxide and water vapors combine to form H2CO3. After decomposition, the Na2CO3 had a mass of 5.27 grams.

1. Determine the mass of the H2CO3 produced.

2. Calculate the percentage yield of H2CO3 for the reaction.

SHOW WORK.
(10 points)

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

Calcium chloride +gold(1) oxide—>

The organism shown is a free-living one that is anchored to the bottom of ponds and streams during one stage of its life cycle what is the common name for the group to which this organism belong