Chemical name of potash alum

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams

When can a hypothesis be elevated to the status of a theory? a) when it is validated by an experiment b) when data gathered from an experiment precisely fits predictions c) when it can be proved to be true d) when it meets the test of repeated experimentation

Use the periodic table to answer the following questions. what is the predicted order of first ionization energies from highest to lowest for beryllium, calcium, magnesium, and strontium? o be > ca > mg > sr o be > mg > ca > sr o ca > sr> be > mg o sr > ca > mg > be done