The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).
Given mass of KNO₃=346g
Molar mass of KNO₃=(39.098)+(14)+(15.99*3)=101.068gmol⁻¹
Volume of Solution=750ml=0.75dm³
Molarity=(mass of solute/molar mass of solute)*(1/volume of sol. in dm³)
=(346/101.068)*(1/0.75)
=4.56 mol dm⁻³
Kepler's Law of Planetary Motion consists the movement of planets in the universe
if not? what are the four or three answers for me to answer?
The chemical name of the table salt is sodium chloride with a chemical symbol of NaCl. If out of 6.1 g of table salt, 2.6 g of Cl was form, this means that 3.5g is Na. Then the percent composition of table salt is,
Na = (3.5 g/ 6.1)x 100% = 57.38%
Cl = (2.6 g /6.1) x 100% = 42.62%
Thus, the percent composition of table salt is 57.38% and 42.62% of Na and Cl, respectively.
Answer:
A & B: 8
C: O
D: 26
E: 30
F: Fe
Explanation:
the first one is Oxygen, the other is Iron.