In chemistry and atomic physics, the main group is the group of elements whose lightest members are represented by helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, and fluorine as arranged in the periodic table of the elements
6.02 x 1023 atoms weigh out 63.55 grams copper.
No. of Molecules in water = 3.5mole x (6.02 x 10^23) molecules/mole = 2.107 x 10^24 molecules of H2O
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.
<u>Answer:</u> The atomic mass of carbon is 12 amu and that of carbon dioxide is 44 g/mol
<u>Explanation:</u>
Molar mass is defined as the sum of the mass of all the atoms each multiplied its atomic masses that are present in the molecular formula of a compound. It is expressed in g/mol.
We know that:
Atomic mass of carbon = 12 amu
We are given a chemical compound, carbon dioxide having chemical formula of
Molar mass of carbon = 12 g/mol
Molar mass of oxygen = 16 g/mol
Evaluating the molar mass of carbon dioxide, we get:
Molar mass of
Hence, the atomic mass of carbon is 12 amu and that of carbon dioxide is 44 g/mol
Answer:
Theoretical yield
Explanation:
The theoretical yield of a product obtained from a reaction is the maximum obtainable amount of product from the reaction under ideal conditions and if all the limiting reactant is used up in the reaction. the actual yield however is lower a little than the theoretical yield in value