Answer:
Volume of the rock, V = 2 mL
Explanation:
It is given that,
Water filled in a graduated cylinder is 3 mL
She then drops a small rock into the cylinder and the water level rises to the 5 mL mark
We need to find the volume of the rock.
The volume of the rock is equal to the difference in volume mark. So,
V = 5 mL - 3 mL
V = 2 mL.
20 g is the answer to make it a saturated solution
Answer:
<u><em></em></u>
- <u><em>3.42 moles</em></u>
Explanation:
By the law of conservation of energy, assuming no losses of heat to the surroundings, <em>the amount of heat consumed by the dissolution of the ammonium nitrate is equal to the amount of heat released from the water.</em> This is, the ammonium nitrate absorbs all the heat it needs to break the ions apart and get dissolved from the water in which it is being dissolved.
Thus:
↑ ↑ ↑
heat released number of moles molar heat of solution
from water of NH₄NO₃ for NH₄NO₃
Solve for n and compute:
- n = 88.0kJ / (25.7kJ/mol) = 3.42 moles ← answer
Answer:
Prokaryotic cell
Explanation:
If you search it up you will see that the prokaryotic cell looks exactly alike with the picture you have posted.
1 mole of anything always contains 6.02x10^23 molecules or moles (this is Avogadro's number). you can use this ratio to find the number of atoms or molecules in any given amount of substance. Due to that 0.0012 moles can be multiplied by Avogadro's number to find that 0.0012 moles of anything contains 7.224x10^20 atoms or molecules depending on what type of substance you are looking at. Aluminum consists of atoms while octane consists of molecules.
I hope this helps. Let me know in the comments if anything is unclear.