Answer:
[Kr] 4d² 5s²
Explanation:
In group 2 and period 2 is the element Zirconium. Here's an example A noble gas configuration of an atom consists of the elemental symbol of the last noble gas prior to that atom, followed by the configuration of the remaining electrons. So for sodium, we make the substitution of [Ne] for the 1s22s22p6 part of the configuration. Sodium's noble gas configuration becomes [Ne]3s1.
Answer: 24.87g Al2O3
Explanation: Aluminum is our limiting reagent
First of all we need to convert the grams of aluminium to moles, then use the molar fraction of the balanced equation (4 moles of aluminium equals 2 of aluminum oxide).
If we made the same procedure with the oxigen we get a 0.273 mol of Al2O3, therefore the O2 is the excess reagent.
The last step is convert the moles of the limiting reagent to grams
And that´s it!
The second stage of photosynthesis also called Calvin stage produces glucose
Part A -
Water has polar covalent bonds due to the difference in electronegativity between the oxygen and the hydrogen. When a solute such as an ionic compound dissolves, it's constituent ions are pulled apart from one another. Water then forms hydration shells around the pulled apart ions (look above for NaCl being dissolved in water).
This normally only occurs with ionic compounds such as salt and other polar molecules. This is because with non polar molecules, the water would be more strongly attracted to itself meaning it won't form hydration shells.
Part B -
In the example from part A in which an ionic substance is being dissolved in water, the ionic substance is the solute and the water is the solvent.
Answer:
Electrical power is the product of voltage times current.