To make sure that the white powder was all sodium chloride and not mixed with sodium hydrogen carbonate, would you need to add a little less or a little more hydrochloric acid to the reaction?

NaHCO3+HCl\to→ NaCl+H2O+CO2(gas)

If bubbles of the gas (carbon dioxide) intensely evolve during the reaction, then the sample is containing NaHCO3

Explanation:

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a boiling water reactor does not boil the water. a pressurized water reactor boils the water faster. a pressurized water reactor is heated directly by the core. a pressurized water reactor does not use fission.