Identify the precipitate (if any) that forms when nach3co2 and bacl2 are mixed.

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3

Write the overall equation for the reaction occurring in lithium battery?