Cat added a sample of sodium hydroxide to water and determined the pH to be 12. What is the pOH of the solution?
pOH =

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)

Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?

#20 which type of bond is formed when bases pair in dna? ionic bond covalent bond coordinate bond hydrogen bond