In acids and bases, on the ph scale, is a 14 considered strong for a base, while 8 is weak, and is 1 weak for an acid while 7 is strong for an acid?

21. consider the following chemical reaction: n2+ o2 2 no if 10.0 g of n2 reacts with excess oxygen then how many grams of no can be formed? a) 10.7 g b) 21.4 g c) 32.9 g d) 42.8 g page 4 of 8

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?

No copying 15 pts how does a free-body diagram tell you about the net force on an object?