Silicon has 14 protons Potassium has 19 electrons The neutrons are equal to the mass number minus the atomic number. Or the big number minus the small number on the periodic table. hydrogen 1 does not have a neutron.
iron =56 -26 for 30 neutrons in the nucleus
Chlorine 17 protons and 17 electrons. 18 or 19 neutrons on average.
Answer:
scientist came to the conclusion that all living things are made of cells by con
Explanation:
Answer:
ΔErxn = -6212.6kJ/mol
Explanation:
When 0.538 g of biphenyl (C₁₂H₁₀) undergoes combustion in a bomb calorimeter, the temperature rises from 26.1 ⁰C to 29.8 ⁰C.
Answer: Option (b) is the correct answer.
Explanation:
When we compare the solubilities of the noble gases in water, then solubility increases from the smallest atomic weight to the largest, Ar < Kr < Xe. This is because more is the atomic weigh of the gas more will be the dispersion forces present in it.
As a result, it will have more number of attractive interactions with the water molecules. Therefore, more is the attraction more will be the solubility of the gas.
Thus, we can conclude that the statement heavier the gas, the more dispersion forces it has, and therefore the more attractive Interactions it has with water molecules, is the best explanation.
For ever molecule of MgCl2, there are 2 Cl atoms.
1.81 x 10^24 molecules MgCl2 x 2 = 3.62 x 10^24 atoms Cl
3.62 x 10^24 atoms Cl x 1 mol / 6.022 x 10^23 = 6.01 moles Cl
Hope I helped!