Answer:
S–34
Explanation:
From the question given above, the following data were obtained:
Neutron number = 18
The isotope of sulphur still retains its atomic number of 16.
Recall:
Atomic number = proton number
Atomic number of sulphur (S) = 16
Therefore,
Proton number = 16
Next, we shall determine the mass number of the sulphur isotope. This can be obtained as follow:
Proton number = 16
Neutron number = 18
Mass number =.?
Mass number = Proton + Neutron
Mass number = 16 + 18
Mass number = 34
The symbol for sulphur is S.
Thus, the symbol of sulfur isotope that contains 18 neutrons is S–34
Explanation:
no. of molea of Ca(NO3)2 = given mass/molar mass
no. of moles= 92/ 164 = 0.56 mol
formula=
Molarity = moles of solute /solution in litres
Molarity = 0.56/ 0.4
=1.4 M
hope it helped!
Answer:
a usually reversible change in the physical properties of a substance, as size or shape
<u>For example:</u>
Freezing a liquid is a physical change.
The boiling point in ethanol is much higher than hexane due to ethanol having stronger hydrogen bond present compared to hexane. Therefore the ethanol requires more energy to break the bonds, having a higher boiling point.