How many moles of oxygen are in 1 mole of pb(so4)2?

If a planet rotates 360 degrees during a 24 hour time period, what does that tell us about the planet? a. the middle of the planet is in darkness b. the seasons on the planet vary every day. c. the planet runs on a 12-hour time clock. d. the temperature on the planet varies daily.

Why are pipes bursting in the in extremely cold weather?

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?