5(NH4)2O
how many of each element is present in the following formula?

the population of unionid mussels in the hudson river decreased after zebra mussels were introduced. zebra mussels, a nonnative species, competed with the unionid mussels for food. the zebra mussels were able to outcompete the unionid mussels, allowing the zebra mussel population to increase dramatically over six years. the unionid mussel population decreased due to a lack of food.

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a chemical change results in a new substance being formed; whereas a physical change will result in a different state of matter

explanation: