chemical reactions in the kitchen
Baking soda and vinegar create carbon dioxide. In both of these cases, a chemical reaction between a solid and liquid creates a new substance, a gas. Both yeast and baking soda can be used to create a gas.
chemical reactions in living things
when you hard boil an egg, the hydrogen sulfide produced by heating the egg white can react with iron from the egg yolk to form a grayish-green ring around the yolk.
Hello!
We know that by the Law of Avogrado, for each mole of substance we have 6.02 * 10²³ atoms, if:
The molar mass of water (H2O)
H = 2 * (1u) = 2u
O = 1 * (16u) = 16u
---------------------------
The molar mass of H2O = 2 + 16 = 18 g / mol
If:
1 mol we have 6.02 * 10²³ atoms
1 mole of H2O we have 18 g
Then we have:
18 g ------------- 6.02 * 10²³ atoms
5 g -------------- x
![\dfrac{18}{5} = \dfrac{6.02*10^{23}}{x}](https://tex.z-dn.net/?f=%20%5Cdfrac%7B18%7D%7B5%7D%20%3D%20%5Cdfrac%7B6.02%2A10%5E%7B23%7D%7D%7Bx%7D%20%20%20)
![18*x = 5*6.02*10^{23}](https://tex.z-dn.net/?f=%2018%2Ax%20%3D%205%2A6.02%2A10%5E%7B23%7D%20)
![18\:x = 3.01*10^{24}](https://tex.z-dn.net/?f=%2018%5C%3Ax%20%3D%203.01%2A10%5E%7B24%7D%20)
![x = \dfrac{3.01*10^{24}}{18}](https://tex.z-dn.net/?f=%20x%20%3D%20%5Cdfrac%7B3.01%2A10%5E%7B24%7D%7D%7B18%7D%20%20)
![\boxed{\boxed{x \approx 1.672*10^{23}\:atoms}}\end{array}}\qquad\checkmark](https://tex.z-dn.net/?f=%20%5Cboxed%7B%5Cboxed%7Bx%20%5Capprox%201.672%2A10%5E%7B23%7D%5C%3Aatoms%7D%7D%5Cend%7Barray%7D%7D%5Cqquad%5Ccheckmark%20)
I Hope this helps, greetings ... DexteR! =)