A solution of NaCl(aq) is added slowly to a solution of lead nitrate, Pb(NO3)2(aq)
Pb
(
NO
3
)
2
(
aq
)
, until no further precipitation occurs. The precipitate is collected by filtration, dried, and weighed. A total of 16.73 g PbCl2(s)
16.73
g
PbCl
2
(
s
)
is obtained from 200.0 mL
200.0
mL
of the original solution.

Calculate the molarity of the Pb(NO3)2(aq)
Pb
(
NO
3
)
2
(
aq
)
solution.

Which of the following happens during cell division? (a) energy is created (b) waste is eliminated (c) carbon dioxide is released (d) damaged cells are replaced

Sulfur dioxide and oxygen react to form sulfur trioxide during one of the key steps in sulfuric acid synthesis. an industrial chemist studying this reaction fills a 25.0l tank with 4.5 mol of sulfur dioxide gas and 4.5 mol of oxygen gas at 30.°c. he then raises the temperature, and when the mixture has come to equilibrium measures the amount of sulfur trioxide gas to be 1.4 mol. calculate the concentration equilibrium constant for the reaction of sulfur dioxide and oxygen at the final temperature of the mixture. round your answer to 2 significant digits.

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign