What does an increase of 1 pH number represent? A. An increase in hydrogen ion concentration by a factor of 10 O B. A decrease in hydrogen ion concentration by a factor of 10 C. An increase of 1 mole per liter of hydrogen ions D. A decrease of 1 mole per liter of hydrogen ions​

4. a 20-kg child is tossed up into the air by her parent. the child is 2 meters off the ground traveling 5 m/s. circle one: ke / gpe / both show your work for finding the values of each type of energy the object has:

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa

What changes occur in the reaction indicated by the equation? check all that apply. the hydrogen nucleus loses protons. the oxygen nucleus gains protons. the bond in h2 is broken, and new bonds are formed between hydrogen and oxygen atoms. each electron associated with a hydrogen atom is shared with an oxygen atom.