Answer:
An aluminium drink can.
24 carat gold.
The helium gas in a balloon that floats upwards.
Cast iron garden railings.
Lead sheeting used by builders on the roofs of houses.
Answer:
0.0345kg is the mass of 25L of the sample
Explanation:
Hydrophosphoric acid, H₃P = Phosphine has a density of 1.38g/L.
To solve this question we need to convert the volume of the gas to mass in grams as first and then to kilograms as follows:
<em>Mass in grams:</em>
25L * (1.38g / L) = 34.5g
<em>Mass in kilograms:</em>
34.5g * (1kg / 1000g) = 0.0345kg is the mass of 25L of the sample
Answer:
Explanation:
CO₂ (aq) + H₂O (l) ⇄ H₂CO₃ (aq)
Equilibrium constant
Kc = [H₂CO₃] / [CO₂] [H₂O]
B )
PCl₃(g) + Cl₂(g) <--> PCl₅(g)
Kc = 24.3 .
[PCl₃] = .10M ,
[Cl₂] = 0.15 M
[PCl₅] = 0.60 M.
Qc = [PCl₅] / [PCl₃] [Cl₂]
= .60 / .10 x .15
= 40
Qc > Kc
Hence the reaction will proceed from left to right to reach equilibrium . It is so because the product concentration is more .
Option C is the right choice .
Numbers of moles = weight (g) / molecular weight (g/mole)
47000 metric tons = 47000000000 g
∵ molecular weight of sulfuric acid = 98 g/mole
∴ No. of moles of sulfuric acid = 47000000000/98 = 479591836.73 moles