If distance, d, is proportional to time, t, and at time t =2.00 seconds, the distance is 6.20 m, find the distance when t = 3.50 s.

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?

Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2•2h2o          sncl2•4h2o          sncl2•6h2o

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.