А city's water supply is fluoridated by adding NaF. The desired concentration of F is 1.6ppm. How many
mg of NaF should be added per
gallon & of
treated water if the water supply
is 0.2 ppm in F-?​

Imagine one batch of soup (batch “a”) is made with 8.19 g/can of salt, according to the recipe, and a second batch of soup (batch “b”) is made with 8.32 g/can of salt. explain which batch would be more resistant to frost damage if it is shipped a great distance in winter and explain why.