NaCl and Pb(NO3)2 are mixed. What is the net ionic equation for this reaction? a. Pb2+ + Cl --> PbCl(s)

b. 2Na+ + 2NO3 --> 2NaNO3 (s)

c. Na+ + NO3 --> NaNO3(s)

d. Pb2+ + 2Cl --> PbCl2(5)

What are the percent by mass of copper in penny lab

Base your answer on the information below and on your knowledge of chemistry. nitrogen dioxide, no2, is a dark brown gas that is used to make nitric acid and to bleach flour. nitrogen dioxide has a boiling point of 294 k at 101.3 kpa. in a rigid cylinder with a movable piston, nitrogen dioxide can be in equilibrium with colorless dinitrogen tetroxide, n2o4. this equilibrium is represented by the equation below. 2no2(g) n2o4(g) + 58kj at standard pressure, compare the strength of intermolecular forces in no2(g) to the strength of intermolecular forces in n2(g).

Which characteristics can be used to differentiate star systems? check all that apply.