Answer:
The concentration of nitrate ion 
is 0.033 M.
Explanation:
1 mole of ![[Al^{3+}]](https://tex.z-dn.net/?f=%5BAl%5E%7B3%2B%7D%5D)
= 3 mole
Let ![[NO_{3}^{-}]](https://tex.z-dn.net/?f=%5BNO_%7B3%7D%5E%7B-%7D%5D)
= 3y
then according to above reaction,
= y
= 0.10 M (given)
= ?
3y = 0.10 M
y = 0.033 M
So ,concentration of = y = 0.033 M
It has 4 valence electron, all of which are needed to bond with nearest neighbors
Answer: properties
Explanation:
The element which has the properties
Mallablity
Ductility
Lusterous
High electric. Conductivity
High tensile strength is said to be metal.
Answer:
Statement B "Elements at the right side of the period are smaller in size" is not true.
Explanation:
Going through the rows of the elements in the period the size of the elements get continuously bigger.
<h3>
Answer: b) 0.250 mol</h3>
============================================
Work Shown:
Using the periodic table, we see that
- 1 mole of carbon = 12 grams
- 1 mole of oxygen = 16 grams
These are approximations and these values are often found underneath the atomic symbol. For example, the atomic weight listed under carbon is roughly 12.011 grams. I'm rounding to 2 sig figs in those numbers listed above.
So 1 mole of CO2 is approximately 12+2*16 = 44 grams. The 2 is there since we have 2 oxygens attached to the carbon atom.
-------------------
Since 1 mole of CO2 is 44 grams, we can use that to convert from grams to moles.
11.0 grams of CO2 = (11.0 grams)*(1 mol/44 g) = (11.0/44) mol = 0.250 mol of CO2
In short,
11.0 grams of CO2 = 0.250 mol of CO2
This is approximate.
We don't need to use any of the information in the table.
