Using improved chemistry equipment in the late 1700s, chemists
observed that mass is neither created nor destroyed in a chemical
reaction. this scientific law is called the law of
a. definite proportions.
b. gravity.
c. conservation of mass.
d. conservation of momentum.

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?

How many moles of cu are needed to react with 5.8 moles of agno3? cu + 2 agno3 → cu(no3)2 + 2 ag

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .