Conservation of Matter

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30 grams of salt is poured into 100 grams of water. How much will the salt water mixture weigh after the salt dissolves?

100 grams of cheese is melted in a microwave. How much should the liquid cheese weigh?

20 grams of water is poured into a jar with 10 grams of pepper, and it is stirred. How much does the pepper water weigh together?

30 grams of vinegar is poured into 30 grams of baking soda in a jar that does NOT have a lid. Why will the new substance that forms weigh less that 60 grams?

A stick of butter (113 grams) melts. How much should the liquid butter weigh?

10 grams of milk is poured into 200 grams of coffee. How much will the milk and coffee weigh together?

20 grams of water is poured into a jar with 10 grams of sugar, and it is stirred. How much does the sugar water mixture weigh together?

30 grams of baking powder and 30 grams of vinegar are placed in a jar with a lid, and the mixture is shaken. How much will the new liquids and gases weigh together?