10- B
08
20.67
4
5
Time seconds)
In the graph, which two regions show the particle undergoing zero acceleration and negative acceleration respectively
CA BC shows zero acceleration, and AB shows negative acceleration
Св. AB shows zero acceleration and CD shows negative acceleration
CCBC shows zero acceleration, and CD shows negative acceleration
D. AB shows zero acceleration, and BC shows negative acceleration

Acurium-245 nucleus is hit with a neutron and changes as shown by the equation. complete the equation by filling in the missing parts. 52

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 .

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.