4. Complete the following word equations using this reference acid + metal ► salt + hydrogen (a) hydrochloric acid + magnesium - (b) nitric acid + iron
(c) carbonic acid + calcium
(d) sulphuric acid + aluminium​

hi,

the capital city of australia is canberra.

a is the correct answer

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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