Subtances have a definite and unchanging chemical composition. Example of Subtances are salt, water, baking soda, Carbon dioxide and oxygen. They are subtances because their composition is?​

It is important to wear proper protective equipment in lab even when not actively performing experiments because accidents can affect any researcher, even one not working on an experiment. select the best answer from the choices provided

Calculate the mass of carbon in 97.0 g of sucrose c12h22o11

Phosphorous acid, h3po3(aq) , is a diprotic oxyacid that is an important compound in industry and agriculture. p k a1 p k a2 1.30 6.70 calculate the ph for each of the points in the titration of 50.0 ml of 1.5 m h3po3(aq) 1.5 m h 3 po 3 ( aq ) with 1.5 m koh(aq). 1.5 m koh ( aq ) .