a) pto₂ + 2h₂ ⟶ pt + 2h₂o
b) 0.021 g
c) 0.010 mol; 0.18 g
a) balanced equation
we know we will need a balanced equation with masses and molar masses, so let’s gather all the information in one place.
m_r: 2.016 195.08 18.02
pto₂ + 2h₂ ⟶ pt + 2h₂o
b) mass of h₂
(i) calculate the moles of pt
n = 1.0 g pt × (1 mol pt /195.08 g pt)
= 5.13 × 10⁻³ mol pt
(ii) calculate the moles of h₂
the molar ratio is (2 mol h₂/1 mol pt)
n = 5.13 × 10⁻³ mol pt × (2 mol h₂/1 mol pt)
= 0.0103 mol h₂
(iii) calculate the mass of h₂
m = 0.0103 mol h₂× (2.016 g h₂/1 mol h₂)
m = 0.021 g h₂
you need 0.021 g h₂ to produce 1.00 g pt.
c) moles of water
the molar ratio is (2 mol h₂o/1 mol pt)
moles of h₂o = 5.13 × 10⁻³ mol pt × (2 mol h₂o/1 mol pt)
= 0.010 mol h₂o
mass of water = 0.010 mol h₂o × (18.02 g h₂o/1 mol h₂o)
= 0.18 g h₂o
a. more n₂ and o₂ would formed.
explanation:le chatelier's principle states that "when any system at equilibrium for is subjected to change in concentration, temperature, volume, or pressure, then the system readjusts itself to counteract the effect of the applied change and a new equilibrium is established that is different from the old equilibrium".
n₂ + o₂ ↔ 2 noaccording to le chatelier's principle, the addition of no will result in shifting the system to lift to increase n₂ and o₂ concentrations and reduce the stress of no addition and readjust the equilibrium again. so, more n₂ and o₂ would formed.
answer: option (c) is the correct answer.
when a substance changes from solid state to liquid state then this is known as melting of substance. whereas when a substance changes from liquid state to gaseous state then this process is known as boiling of substance.
when solid changes into liquid then there is decrease in force of attraction between the particles. on the other hand, when liquid changes into gaseous form then there are weak force of attraction between the molecules and they tend to move far apart from each other.
thus, we can conclude that bonding forces determines the temperature at which a substance melts and boils.