<span>The question says.'which option describes a similarity between isotopes of an element. The correct option is C. Isotopes have the same number of atomic number but different mass number. The mass number is the summation of proton and neutron. The number of proton is always constant but that of neutron changes to reflect the existence of isotopes.</span>
A chemical change or relation
Answer:
contains only water
Explanation:
Distilled water contains pure water only without any other component. If sea water is distilled, it gives off water at its boiling temperature.
Simple distillation is procedure used to obtain a solvent from a solution. It can be used to separate a mixture of liquids in which the components are at different boiling points.
When sea water is distilled, the solution is boiled in a distillation flask to vaporize the solvent. The vapor is condensed back to liquid using a condenser. The pure liquid is collected in a receiver. The solute impurities remain in the flask.
<span>they are stratospheric ozone depleters, these are chemicals that destroy the ozone in the stratosphere. These include chlorofluorocarbons (CFCs), halons, compounds with cholrine or bromine.</span>
(1) compound with seven carbons with double bond and the rest single bond :
HEPTENE
(2) four carbons with a double bond between the third and the fourth carbon:
1-BUTENE
(3) Propyl group branching from the third carbon from the left:
3-Propyl heptene