Which of the following is true about chemical reactions? They are accompanied by changes in energy.
They form new substances with new properties.
both A and B
neither A nor B

Phosphorous acid, h3po3(aq) , is a diprotic oxyacid that is an important compound in industry and agriculture. the values of phosphorous acid are 1.30 6.70 calculate the ph for each of the given points in the titration of 50.0 ml of 1.5 m h3po3(aq) with 1.5 m koh(aq) .

Compare and contrast physical changes with chemical changes.

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons