The atomic number of sulfur is 16. how many electrons are there in an atom of sulfur of -34?

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

If a balloon is taken outside on a very cold day, what will occur?

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.