Linked-up atoms form matter called?

Use a magnet to separate iron, evaporate water, i'm not sure how to separate the other two i'm sorry but good luck

Conservation efforts have been effective in "increasing the number of endangered species, reducing all the negative impacts of human activity, and preserving wildlife habitats".hope my answer has you : ) 

#2- the hno3 has a h+ ion and the naoh has an oh- ion

The fraction of an original sample of tritium that remains unchanged after 24.62 years is 1/4. if you need the percentage it is 25%