Answer:
To calculate an electron configuration, divide the periodic table into sections to represent the atomic orbitals, the regions where electrons are contained. Groups one and two are the s-block, three through 12 represent the d-block, 13 to 18 are the p-block and the two rows at the bottom are the f-block.Explanation:
<span>When group II metal nitrate is heated, it produces metal oxide and nitrogen dioxide gas, and the ratio between metal nitrate and metal oxide is 1:1 .
From 1 mole nitrate you get 1 mole oxide.
As:
Number of moles = Given Mass/ Molar Mass
Molar mass of 2 Nitrate ions (anions) = 2*(14+48) = 124 gm.
And the Atomic mass of oxygen is 16 gm.
So the oxide has weight of : 5-3.29 g = 1.71 g
Now as metal oxide and metal nitrate have equal no. of moles, so :
Given mass of metal nitrate/Molar mass of metal nitrate = Given mass of metal oxide/Molar mass of metal oxide
Let us say that the mass of the metal is x grams.
So, molar mass of metal nitrate = x + 124 grams
Molar mass of metal oxide = x + 16 grams.
Therefore , we get : 5/x+124 = 1.71/x+16
5(x+16) = 1.71(x+124)
5x + 80 = 1.71 x + 212.04
5x - 1.71 x = 212.04 - 80
3.29 x = 132.04
x = 40 (Approx.)
Therefore, the mass of the metal used is 40 grams. Therefore it is Calcium as it has mass of 40 grams (atomic mass) . </span>
Astronomers measure things in space using light-years because there is not relative way to actually measure things in space. Which makes measuring anything in space extremely time consuming and hard work. I hope this helped. I didnt use Google and this is all from my brain. Please give me Brainliest!
Answer:
the percentage of carpet is calcium carbonates is 12.456734190
2. I believe it would be two but then again this is an incomplete answer so it is not two. It's probably going to be 3. Or 1. Because I took this test before a while back and I'm almost a 100% sure it's 1 or 3. Hope this helps slightly!
