How advanced we’ve become in science and studying elements
Answer:
B) a neutron
Explanation:
The mass of a proton is approximately the mass of a neutron.
Both a neutron and proton are nuclear particles that are found within the nucleus of an atom.
Protons are the positively charged particles within an atom.
Neutrons do not have any charges on them.
Approximately the mass of:
Protons = 1.67 x 10⁻²⁷kg
Neutrons = 1.68 x 10⁻²⁷kg
Answer:
By heating the solution a saturated solution can be changed into an unsaturated solution. Without adding any solvent it can be changed into an unsaturated solution. Example: on heating a saturated solution of sugar in high temperature, it starts dissolving.
The NaOH can react with HCl with the formula: NaOH + HCl = NaCl + H2O. So if you want to neutralize the solution, the molar number of NaOH and NCl need to be equal. So we need 0.3*50/0.1=150 milliliters.
For example Cretaceous–Paleogene extinction event approximately 66 million years ago led to extinction<span> of approximately three quarters of the plant and animal in Earth. Dinosaurs extinct, but mammals adopt to new conditions and soon becaome one of the largest group in Earth.</span> Temperature drops unnaturaly in Earth's atmosphere. <span> This catastrophe end of the </span>Cretaceous<span> and entire </span>Mesozoic <span>Era and start the </span>Cenozoic<span> Era.</span>