Aneutron walks into a gas station to buy some snacks. he ask the cashier ,"how much"? the cashier replies,"for you? no charge." i don't understand. what this means ?

Ineed ! i have no clue how to do this problem.

Why is the melting of ice a physical change ?

Be sure to answer all parts. the following equilibrium constants were determined at 1123 k: c(s) + co2(g) ⇌ 2co(g) k'p = 1.30 × 1014 co(g) + cl2(g) ⇌ cocl2(g) k''p = 6.00 × 10−3 calculate the equilibrium constant at 1123 k for the reaction: c(s) + co2(g) + 2cl2(g) ⇌ 2cocl2(g) 4.68 × 10 9 (enter your answer in scientific notation.) write the equilibrium constant expression, kp: