Answer:
My guess is b or c but its robably wrong
Explanation:
I just also need points sorry <3
1. Because of the Ozone Layer.
2. Put on Sunscreen.
Answer:
5
Explanation:
(2n+1 C + N - H - O)÷2=(9×2+2-10)÷2=5
They do not change the nature of the substance unless a chemical change occurs along with the physical change. These may be irreversible, but the result is still composed of the same molecules. When you cut your hair, that is a physical change, even though you can't put the hair back on your head again
<u>Answer:</u> The number of formula units in the given amount of NaCl are
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
Given mass of NaCl = 0.11 mg = (Conversion factor: 1 g = 1000 mg)
Molar mass of NaCl = 58.5 g/mol
Putting values in above equation, we get:
According to mole concept:
1 mole of a compound contains number of formula units
So, moles of NaCl will contain = number of formula units
Hence, the number of formula units in the given amount of NaCl are