The element name is: Antimony
The chemical symbol: Sb
Atomic Mass: 121.75
Atomic Number: 51
There will be chemical reaction(equation4Na+02--2Na20
The correct answer would be the first option. The arrows 1, 2 and 3 represent the phase transitions where heat energy is gained. As heat energy is gained the kinetic energy of the molecules in a substance is increased which would cause them to change phases from solid to liquid and to gas.
Answer:
Partial pressure of oxygen 
atm
Partial pressure of Helium 
atm
Explanation:
We will first find the number of moles of each gas
The molar mass of oxygen is 
grams per mole
The molar mass of helium is 
grams per mole
The number of moles of oxygen in the solution
The number of moles of helium in the solution
The number of moles of oxygen in the solution
Total number of moles in the solution is equal to
Partial pressure of oxygen
atm
atm
Partial pressure of Helium
atm
atm
1) Write the balanced chemical equation:
2Al + 6HCl ---> 2AlCl3 + 3H2
2) Calculate the molar masses of Al and HCl and use them to convert the data to moles
Al: 27g/mol => 10.7 gAl / 27g/mol = 0.396 mol Al
HCl: 1g/mol + 35.5 g/mol = 36.5g/mol => 42.5gHCl / 36.5g/mol = 1.164 mol HCl
Theoretical ratio: 6 mol HCl / 2 mol Al = 3:1
Actual ratio: 1.164 mol HCl / 0.396 mol Al = 2.94 : 1
Then there is a little bit less HCl than the predicted by theoretical ratio, which means that this is the limitant reagent.
3) Use the amount of HCl to make the calculations of the proucts obtained.
Theoretical ratio: 3 mol H2 / 6 mol HCl = 1:3
1.164 mol HCl * 1 mol H2 / 3 mol HCl = 0.388 mol H2
4) Use the ideal gas formula to obtain the volume
pV = n RT
p = 725 mmHg * 1atm / 760mmHg = 0.954 atm
n = 0.388 mol
R = 0.082 atm*liter /K*mol
T = 47 °C + 273.15 = 320.15K
V = nRT/p = 0.388 mol * 0.082 [atm*liter/K*mol] * 320.15K / 0.954 atm = 10.7 liter
Answer: 10.7 liter
