Which of the following are considered physical changes? [mark all correct answers]
a. Boiling water
b. Crushing a can
c. Burning wood
d. Rusting nail
e. Shredding paper

Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

Consider the directing effects of the substituents on salicylamide and predict the possible structures of the iodination products. which do you think will be the major product?