<span><span>Number of Protons-19 </span><span>Number of Neutrons-20 </span><span>Number of Electrons-<span>19</span></span></span>
Answer:
Yes.
Explanation:
If you want to use the least fuel, then missions to Mars are feasible every two years.
You want to launch when Earth and Mars are close together, and this happens <em>about every 26 months</em>.
However, Earth travels faster than Mars, so the spaceship must launch when Mars is 44° <em>ahead </em>of Earth in its orbit.
The ship will then use the most efficient trajectory to arrive at Mars.
Yes, it would be the last one as the zeros that appear after a non zero number are significant.
The ratio of the diffusion rate of Cl2 and O2 is 1.5
calculation
rate of diffusion Cl2/ rate of diffusion O2 =√ molar mass of Cl2/ molar mass of O2
molar mass of Cl2 = 35.5 x2 = 71 g/mol
molar mass O2 = 16 x2 =32g/mol
that is rate of diffusion Cl2/ rate of diffusion of O2 =√ 71/ 32= 1.5
C.aluminium
Although the strongest metals are alloys, made up of more than 1 metal (like steel).
