It's your hw so you really should understand it so you dont have to ask for help so I'll try to explain it the best I can.
1.SD (only one switch occurs, between fluorine and bromide)
2.DD (two things are switched, sulfate and nitrate)
3. D (One compound is broken up into smaller compounds)
4.C (The products of combustion are always h20 and co2)
5.DD (again, two things are switched, bromide and nitrate)
6.SD (In SDR, look for a lone molecule reacting with a compound)
7.S (two smaller compounds become one big compound)
8. D( A big compound is broken up)
9. DD (I think Its DD because two molecules were displaced)*not sure
10.DD(two molecules are displaced, phosphate and hydroxide)
Answer:
the bacteria increase in number and use up the dissolved oxygen in the water. When the dissolved oxygen content decreases, many fish and aquatic insects cannot survive. This results in a dead area. Algal blooms may also be of concern as some species of algae produce neurotoxins.Explanation:
Typical oxidation states of copper are
C u + l, and C U +I l cuprous and cupric ions.
Answer is: <span>A. supplies the body with oxygen and nutrients, and picks up carbon dioxide wastes.
</span>The blood<span> transports:
</span>1) oxygen<span> from the </span>lungs<span> to the </span>cells<span> of the body.
</span><span>2) </span>carbon(IV) oxide <span>from metabolism to the lungs, where it is exhaled.
3) </span>nutrients<span>, transports </span>hormones<span> and removes waste products.</span>