Question 1
1 pts
You eat 7,291 kJ of energy in food. You get on a bicycle machine and bike as fast as you can.
The display tells you that you did 1,780 kJ of work. Assuming your body is a closed system,
how much energy of heat did you produce (in kJ)?

What is the number of atoms in 3.54 mol s

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together

How many lone pairs of electrons are on the central atom of no3- and what is the molecular shape? one, trigonal planar zero, trigonal pyramidal zero, trigonal planar one, tetrahedral one, trigonal pyramidal