What is the mass of NaCl required to make 140 grams of a 12% solution of NaCl in water?

An occluded front moves over the farmland that has been experiencing drought conditions. what change in weather will this front likely bring? a. gray skies, but no rain b. an extended period of rain c. more dry air and sunny skies d. violent, short-lived thunderstorms

What is the mass of each element in a 324.8 sample of co2

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.