Is the mole considered a base unit in the si system

Rutherford's experiment indicated that matter was not as uniform as it appears what part of his experimental results implied this idea

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

Nitrogen dioxide decomposes according to the reaction 2 no2(g) ⇌ 2 no(g) + o2(g) where kp = 4.48 × 10−13 at a certain temperature. if 0.70 atm of no2 is added to a container and allowed to come to equilibrium, what are the equilibrium partial pressures of no(g) and o2(g)