Answer:
Chloroplasts captures and stores energy for the cell by the process of photosynthesis
Answer:
C
Explanation:
The ball is undergoing a gravitational potential to kinetic energy transformation. When the ball is at the top of the slope, it has the potential to be moved down by gravity, hence the name. When it's rolling down the slope, it turns to kinetic energy, which is when something moves.
In the Lewis structure of PO43- there are a total of 32 valence electrons. For the Lewis structure for PO4 3- you should take formal charges into account to find the best Lewis structure for the molecule. Remember, PO4 3- has a negative three charge on the molecule.
Answer:
![\boxed {\boxed {\sf 5.1 \ mol \ H_2O}}](https://tex.z-dn.net/?f=%5Cboxed%20%7B%5Cboxed%20%7B%5Csf%205.1%20%5C%20mol%20%5C%20H_2O%7D%7D)
Explanation:
To convert from representative particles to moles, Avogadro's Number: 6.02*10²³, which tells us the number of particles (atoms, molecules, etc.) in 1 mole of a substance.
We can use it in a ratio.
![\frac {6.02*10^{23} \ molecules \ H_2O}{1 \ mol \ H_2O}](https://tex.z-dn.net/?f=%5Cfrac%20%7B6.02%2A10%5E%7B23%7D%20%5C%20molecules%20%5C%20H_2O%7D%7B1%20%5C%20mol%20%5C%20H_2O%7D)
Multiply by the given number of molecules.
![3.1*10^{24} \ molecules \ H_2O*\frac {6.02*10^{23} \ molecules \ H_2O}{1 \ mol \ H_2O}](https://tex.z-dn.net/?f=3.1%2A10%5E%7B24%7D%20%5C%20molecules%20%5C%20H_2O%2A%5Cfrac%20%7B6.02%2A10%5E%7B23%7D%20%5C%20molecules%20%5C%20H_2O%7D%7B1%20%5C%20mol%20%5C%20H_2O%7D)
Flip the ratio so the molecules of water cancel out.
![3.1*10^{24} \ molecules \ H_2O*\frac {1 \ mol \ H_2O}{6.02*10^{23} \ molecules \ H_2O}](https://tex.z-dn.net/?f=3.1%2A10%5E%7B24%7D%20%5C%20molecules%20%5C%20H_2O%2A%5Cfrac%20%7B1%20%5C%20mol%20%5C%20H_2O%7D%7B6.02%2A10%5E%7B23%7D%20%5C%20molecules%20%5C%20H_2O%7D)
![3.1*10^{24} *\frac {1 \ mol \ H_2O}{6.02*10^{23} }](https://tex.z-dn.net/?f=3.1%2A10%5E%7B24%7D%20%2A%5Cfrac%20%7B1%20%5C%20mol%20%5C%20H_2O%7D%7B6.02%2A10%5E%7B23%7D%20%7D)
![\frac {3.1*10^{24} \ mol \ H_2O}{6.02*10^{23} }](https://tex.z-dn.net/?f=%5Cfrac%20%7B3.1%2A10%5E%7B24%7D%20%5C%20mol%20%5C%20H_2O%7D%7B6.02%2A10%5E%7B23%7D%20%7D)
Divide.
![5.14950166113 \ mol \ H_2O](https://tex.z-dn.net/?f=5.14950166113%20%5C%20mol%20%5C%20H_2O)
The original number of molecules has 2 significant figures: 3 and 1, so our answer must have the same. For the number we calculated, that is the tenth place. The 4 in the hundredth place tells us to leave the 1.
![5.1 \ mol \ H_2O](https://tex.z-dn.net/?f=5.1%20%5C%20mol%20%5C%20H_2O)
There are about 5.1 moles of water in 3.1*10²⁴ molecules of water.