Answer:
the reactivity of alkaline earth metals increases from top to the bottom of the group, that's because the atoms get bigger from the top to the bottom so the valence electrons are farther from the nucleus.
Answer:atomic number 10 noble gas
Explanation:
Answer:
Yes, water molecules becomes gas particles when the vapor pressure is lower than the external atmospheric temperature.
Explanation:
Vapor pressure is defined as the pressure of the vapor that lies above its surface. In other words, it is the pressure of the vapor which results from the evaporation of a liquid which is above a liquid in a closed or open container.
The liquid starts boiling or evaporation takes place when the vapor pressure of the liquid becomes equal to the external or atmospheric pressure. Now when the vapor pressure is less than the atmospheric pressure, the liquid boils at a higher temperature while when vapor pressure is more than the atmospheric temperature, the liquid starts boiling a lower temperature.
The given compound is:
Ti6Al4V
1 mole of Ti6Al4V contains 6 moles of Ti
therefore, 5 moles of Ti6Al4V will have: 5 * 6/1 = 30 moles of Ti
Now,
1 mole of Ti contains 6.023 * 10^23 atoms of Ti
therefore, 30 moles of Ti will be composed of: 30 *6.023 * 10^23/1
= 1.807 * 10^25 atoms
Thus, 5 moles of Ti6Al4V will have 30 moles of Ti which in turn corresponds to 1.807*10^25 atoms of Ti.
2Fe(OH)3 → Fe2O3 + 3H2O
There are 2 iron atoms on the left,
and 2 iron atoms on the right. There are 6 oxygen atoms on the left, and 6
oxygen atoms on the right. There are 6 hydrogen atoms on the left and 6
hydrogen atoms on the right.
This equation is balanced.
2Al(OH)3→ Al2O3+ 3H2O
There are 2 aluminum atoms on the
left, and 2 aluminum atoms on the right. There are 6 oxygen atoms on the left,
and 6 oxygen atoms on the right. There are 6 hydrogen atoms on the left and 6
hydrogen atoms on the right.
<span>This equation is balanced.</span>
