Consider the following substances: hydrogen gas (H2), carbon dioxide (CO2), Sulfur (S8). neon (Ne) and propane (C3H8). Which substance(s) are elements, compounds, atoms, or molecules?
(the numbers aren't supposed to look like that they're supposed to be small)

During which time interval does the object travel approximately 10 meters

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).

0.09 moles of sodium sulfate in 12 ml of solution