Question: A plastic block has a mass of 52.18 grams, a length of 10.5 cm, a width of 3.22 cm, and a height of 2.08 cm. What is the density of the plastic in g/cm3? A : 122
B : 0.741
C : 0.37
D : 1.35

One or more substances changing into one or more substances is an example of a

Base your answer on the information below and on your knowledge of chemistry. nitrogen dioxide, no2, is a dark brown gas that is used to make nitric acid and to bleach flour. nitrogen dioxide has a boiling point of 294 k at 101.3 kpa. in a rigid cylinder with a movable piston, nitrogen dioxide can be in equilibrium with colorless dinitrogen tetroxide, n2o4. this equilibrium is represented by the equation below. 2no2(g) n2o4(g) + 58kj at standard pressure, compare the strength of intermolecular forces in no2(g) to the strength of intermolecular forces in n2(g).

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.