Answer:
The partial pressure of hydrogen gas at equilibrium is 1.26 atm
Explanation:
Let's use the molar fraction to solve this:
Molar fraction = Moles of gas / Total moles
Molar fraction = Gas pressure / Total pressure
Without equilibrium, we can think that the total system pressure is the sum of the partial pressures of each gas.
1 atm N₂ + 2 atm H₂ = 3 atm
Molar fraction for H₂ = 2 atm / 3atm → 0.66
Let's replace the molar fraction in equilibrium
Gas pressure / 1.9 atm = 0.66
Gas pressure = 1.26atm
2NaOH + H₂SO₄ = Na₂SO₄ + 2H₂O
v(H₂SO₄)=0.25 L
c(H₂SO₄)=2.00 mol/L
v(NaOH)=2.00 L
n(H₂SO₄)=c(H₂SO₄)v(H₂SO₄)
n(NaOH)=2n(H₂SO₄)=2c(H₂SO₄)v(H₂SO₄)
c(NaOH)=n(NaOH)/v(NaOH)=2c(H₂SO₄)v(H₂SO₄)/v(NaOH)
c(NaOH)=2*2.00*0.25/2.00=0.5 mol/L
the concentration of solution of NaOH is 0.5 mol/L
Answer:
Because of its malleability.
Explanation:
Magnesium is alkaline earth metal.
It is present in second group.
It is shiny gray color metal.
It is lighter but strong.
Its density is 1.738 g/mL.
It is soft and can be malleable. Magnesium ribbons are also formed by stretching the magnesium metal and this is due to the malleability of magnesium.
Magnesium ribbon burns and produces heat.
It is used to make the many light weight products such as many parts of car, phone, laptop, luggage etc.
It is also used to remove the sulfur such as from iron and steel.
It is also used in fireworks.
It is also used in medicine such as for constipation.
It is used as antiacid for heart burn.
The correct option is A.
The lanthanides are a group of transition metals which are found in the periodic table. They are fifteen in number and they are all radioactive. They are usually refereed to as the 'rare earth' metals because they are not common. Lanthanides have fairly high melting points.
