Select all the correct answers after learning about climate change in her science class SELENA wants to make a few changes at home so she can affect climate change in a small way which change will give her the best results

Express the following number in scientific notation. 0.026890 =

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

Which buffer would be better able to hold a steady ph on the addition of strong acid, buffer 1 or buffer 2? explain. buffer 1: a solution containing 0.10 m nh4cl and 1 m nh3. buffer 2: a solution containing 1 m nh4cl and 0.10 m nh3