A0.3000-g sample of soda ash (which contains sodium carbonate) is dissolved in 50.00 ml of water. titration with standard 0.1000 m hcl required 42.70 ml of the acid to neutralize the soda ash solution. what is the percent by mass of sodium carbonate in the soda ash sample? the molar mass of sodium carbonate is 105.99 g/mol. the equation for the reaction of sodium carbonate and hydrochloric acid is

The valence of aluminum is +3, and the valence of the chlorine is -1. the formula fir the aluminum chloride is correctly written as

Many ionic compounds and a few highly polar covalent compounds are because they completely ionize in water to create a solution filled with charged ions that can conduct an electric current.

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.