There are 3 parts of the cell theory.
1. All living things are made up of cell- This <span>means that in order for something to be alive, it must either be a cell or made up of many cells. </span>
2. Cells are the smallest units (or most basic building blocks) of life- They are are the most fundamental units of a living organisms structure. They are also the basic units of function. This means that cells carry out all of the processes necessary for an organism to survive.
3. All cells come from preexisting cells through the process of cell division- This means that in order for a new cell to be created, it has to go through cell division with cells that already exist to become a new cell.
Hope this helps :)
Answer:
1. Sn + O2 -----> SnO2
2. 2As + 3H2 -----> 2AsH3
3. KCIO4 ------> KCI + 2O2
<h2>
Which source would be most reliable for gathering experimental results related to a new compound’s molecular mass : A textbook that lists molecular masses of similar compounds</h2>
Explanation:
Atom:
It is a smallest particle of an element which may as may not have independent existence.
The are very small in size.
Their size is measured in unit nm (nanometer)
1nm – 10⁻⁹ m.
hydrogen atom is smallest of all size is only 10⁻¹⁰ nm
Atoms are represented by symbols (given by berzelius )
Atomic mass of element-
Active atomic mass of atom can’t be measured but relative atomic mass can be known.
I.e. relative atomic mass of an atom of element is defined as average relative mass of atom as compared with atom of 612c taken as 12u.
Atomic mass – no. Of times one atom of he element is heavier then 1/12th of c atom.
Molecule
It is smallest particle of an element or compound which is able to exist independently.
Some element exist as
Diatomic molecuel eq:- O₂
Triatomic molecule eq:- O₃
¬
So,
Atomicity – is no. of atoms in a molecule of an element.
Some more examples:- phosphorous P4 (tetra atomic)
sulphur S8 (poly-atomic)
nitrogen N2 (diatomic)
Molecular mass
It is the mass of molecule that is obtained by adding masses of atoms multiplied with number of atoms of each type .
Answer:
The concentration of the sample is 3.564x10⁻³M.
Explanation:
Using Lambert-Beer law, absorbance of a sample is directely proportional to its concentration.
The general graph of the absorbance of the standards with different concentrations is:
Y = 75.9X + 0.0045
R² = 0.9946
<em>Where Y is the absorbance of the sample and X its concentration in mole/L.</em>
If a solution has an absorbance of 0.275:
0.275 = 75.9X + 0.0045
0.2705 = 75.9X
3.564x10⁻³M = X → The concentration of the sample.
Answer- the number of electrons in that particular orbital sub level that’s the answer