A 0. 300 m solution of hcl is prepared by adding some 1. 50 m hcl to a 500 ml volumetric flask and diluting to the mark with deionized water. What volume of 1. 50 m hcl must be added?

Talc (french chalk) is the ingredient

Zinc contains about 30 protons 

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.