4. The blood vessels, heart and the blood make up WkoOxVrg/vie...
o
10 points
a. 1/3 of our body
b. the respiratory system
c. 1/4 of our body
O d. the cardiovascular system

Nitrogen dioxide reacts with water to form nitric acid and nitrogen monoxide according to the equation: 3no2(g)+h2o(l)→2hno3(l)+no(g) part a suppose that 4.2 mol no2 and 0.50 mol h2o combine and react completely. which reactant is in excess? express your answer as a chemical formula. nothing

The first element on the periodic table of elements is carbon. a. true b. false

Consider this equilibrium: n29) + o2(g) + 2no(c).nitrogen gas and oxygen gas react when placed in a closed container. as the reaction proceeds towards equilibrium, what happens to the rate of thereverse reaction?