Jack measured the density of chromium in the lab and obtained the following results: Trail 1: 9.3g/cm
Trail 2: 8.3g/cm
Chromium has a known density of 8.8g/cm.
What is the precent error for trail 2?

Which of the following statements is false regarding aromaticity? a. the compound must be cyclic b. the compound must be fully conjugated c. the compound must be planar d.the number of electrons in the pi system must satisfy the hückel 4n+2 rule e. the compound must have a neutral charge

How is the atomic number of a nucleus changed by alpha decay

Is a pencil falling to the floor anon contact force, a force, or a contact force