Chloroplasts is the answer
Answer:
The air that we breathe in enters the nose or mouth, flows through the throat (pharynx) and voice box (larynx) and enters the windpipe (trachea). The trachea divides into two hollow tubes called bronchi
Explanation:
Answer:
Mass of Fe produced = 4.468 g
Explanation:
Given data:
Mass of Fe produced = ?
Mass of Fe₂O₃ react = 6.50 g
Solution:
Chemical equation:
2Fe₂O₃ → 4Fe + 3O₂
Number of moles of Fe₂O₃ ;
Number of moles = mass/molar mass
Number of moles = 6.50 g/159.69 g/mol
Number of moles = 0.04 mol
Now we will compare the moles of iron and ironoxide.
Fe₂O₃ : Fe
2 : 4
0.04 : 4/2×0.04 = 0.08 mol
Mass of iron produced:
Mass = number of moles × molar mass
Mass = 0.08 mol × 55.85 g/mol
Mass = 4.468 g
Use the specific heat equation for each one:
Q = mCT
m is mass
T is change in temp
C is spec heat
You will not only have to calculate three different specific heats, but also do the heat of vaporization and heat of fusion.
Heat of vaporization is 3.33 * 10^5 J/Kg
Heat of Fusion is 2.26 * 10^6 J/Kg
You’ll want to make sure all your units match. So change all Kg to g (or g to Kg)
-20 to 0 = mC(Ice)T
Melt ice (fusion) = m(heat of fusion)
0 to 100 = mC(Water)T
Boil (Vaporization) = m(heat of vaporization)
100 to 250 = mC(Steam)T
Then add each one together
A Barometer is used to mesure atmosphereic pressure
