- Nitrogen as in NH₃.
- Phosphorous as in PH₃.
<h3>Explanation</h3>
Hydrogen is in group 1. It is one electron away from the next noble gas element. It would form one single covalent bond when it bonds to nonmetals.
A nonmetal atom will gain three extra electrons when it bonds to three hydrogen atoms. For the molecule to be stable, that nonmetal atom should be three electrons away from the next noble gas element. Each of the atoms in question should contain 8 - 3 = 5 valence electrons when neutral. Which column on a periodic table contains such elements?
Answer:
5.88 μM is the concentration of red dye in the sample.
Explanation:
Absorbance is defined s capacity of a substance to absorb a light of a specified wavelength.It is calculated by using Beer-Lambert Law:
A = absorbance
= Molar absorptivity
c = concentration
l = Length of the solution through which light passes
Given, A = 0.468, l = d = 1.00 cm,c = ?
(
)
5.88 μM is the concentration of red dye in the sample.
Answer:
2.1 x 10¹²ng
Explanation:
Mass of the calcium carbonate given is:
2.1kg
We need to take this mass to nanogram, ng.
Since :
1000g = 1kg
10⁹g = 1ng
So;
1kg = 1000 x 10⁹ = 10¹²ng
So;
2.1kg will give;
Since
1kg gives 10¹²ng
2.1kg will give 2.1 x 10¹²ng
