10 mols platinum * 6.02*10^23 atoms = 6.02*10^23 atoms in platinum
Answer:
Photosynthesis can increase the pH level of the water and the reason is because it removes carbon dioxide that is present in the water.
Explanation:
Photosynthesis is a chemical process/cycle that is executed by plants by consuming carbon dioxide and releasing oxygen into the air or water.
The photosynthesis can cause the pH level of the water to rise because of the removal of carbon dioxide from the environment.
I hope this answer helps.
Answer:
Group 13
Explanation:
We have been given some properties of the elements we desire to identify.
The most important and by far unique is the oxidation state of the ions given. This reflects the amount of electrons an atom has lost or gained.
Group 1 and 2 elements have oxidation states of +1 and +2 respectively. This is a very perculiar property of these metals. When group 1 elements lose an electron, nobility is achieved and this goes for group 2 elements too.
Group 12 consists of transition elements. Most transition elements are known to have variable oxidation states. In this group, the common oxidation state is +2.
Group 13 elements have two dominant oxidation numbers which are +1 and +3. Particularly, Aluminum has +2 oxidation state too.
The properties fits in well for aluminum which is a group 13 element.
1) For energy
2) for chemical energy
3) for very chemically-y-y energy-gy-gy
Answer:
5.167 kJ
Explanation:
We have to divide the heating process into two steps: one for the heating process of liquid water (1) and the other for the phase transition from liquid water to steam at 100°C (2)
1 - heating from 52.1°C to 100°C:
heat(1) = m x Cp x ΔT = 2.1 g x 4.184 J/g°C x (100°C-52.1°C) = 420.9 J
2 - vaporization at 100°C:
heat(2) = m x ΔHv = 2.1 g x 2260 J/g = 4746 J
Finally, we add the heat values of the steps:
heat required = heat(1) + heat(2) = 420.9 J + 4746 J = 5166.9 J
Since 1 kJ= 1000 J, we convert from J to kJ:
5166.9 J x 1 kJ/1000 J = 5.1669 kJ ≅ 5.167 kJ