What is the mass of a sample of NH3 containing 3.80 x 1024 molecules of NH3? (5 points) 74.8 grams
107 grams
89.4 grams
101 grams

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

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