It’s a.carbon according to Siri
Answer : The vapor pressure of water at 
is 1.01 atm.
Explanation :
Boyle's Law : It is defined as the pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.
or,
where,
= initial pressure = ?
= final pressure = 750 torr = 0.987 atm (1 atm = 760 torr)
= initial volume = 1.95 L
= final volume = 2.00 L
Now put all the given values in the above equation, we get:
Therefore, the vapor pressure of water at is 1.01 atm.
Molar mass HCl = 1.01 + 35.45 => 36.46 g/mol
number of moles:
mass HCl / molar mass
9.63 / 36.46 => 0.2641 moles of HCl
Therefore:
M = moles / Volume ( in liters )
M = 0.2641 / 1.5
M = 0.1760 mol/L⁻¹
Answer:atomic number 10 noble gas
Explanation:
2Al₂O₃ ----> 4Al + 3O₂
2 moles 3 moles
2 moles of Al₂O₃ ---------- 3 moles of O₂
26,5 moles of <span>Al₂O₃ ------ X
</span>X = (26,5×3)/2
<u>X = 39,75 moles</u> of O₂
:)
