Hello!
The answer is C. Hibernate during the cold winter months.
Why?
Alpine marmots are known for having a long hibernation duration which starts in October (winther) and ends in April (summer) (about 7 months). During this long period, they are able to reduce their bear beats from 200 per minute to just 30 or 38 beats, and their breaths from 60 breaths/minute to 1-3 breaths/minute, guaranteeing an extreme energy saving process.
Have a nice day!
Answer:
607 ppm
Explanation:
In this case we can start with the <u>ppm formula</u>:
If we have a solution of <u>0.0320 M</u>, we can say that in 1 L we have 0.032 mol of , because the molarity formula is:
In other words:
If we use the <u>atomic mass</u> of (19 g/mol) we can convert from mol to g:
Now we can <u>convert from g to mg</u> (1 g= 1000 mg), so:
Finally we can <u>divide by 1 L</u> to find the ppm:
<u>We will have a concentration of 607 ppm.</u>
I hope it helps!
N(CH₃COOH)=c₁v₁=c₂v₂
c₁=2.5 mol/L
c₂=0.50 mol/L
v₁-?
v₂=100.0 mL=0.1000L
v₁=c₂v₂/c₁
v₁=0.50*0.1000/2.5=0.02 L = 20 mL
Answer:
B.) Chemical changes produce new substances, while physical changes do
not.
Explanation:
Rotting, withering, heat and light emission, precipitate formation, gas evolution, or a change of appearance.