The year is 365 days (assume). The day is 86400 secons (60*60*24). The product is
3'153'600 seconds.
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>
I would say that this problem needs more information. Giving only the concentration would not specify anything since in general salts are neutral as they are from neutralization reactions. Specifying other properties of the compound would be more helpful.
The number that would be in the place of x and Y is
x=2
Y=1
Hence the formula will be K2Se
Explanation
When K+ which is positively charged combine with selenide (se2-) which is negatively charged they form an ionic bond K2Se.
- 2 potassium ions K+) loses 1 electron each while selenide ion (Se2-) accept the 2 electron, Hence the formula of ionic bond is K2Se