Molar mass of MgSiO3=24.3+28.1+3(16)=100.4
number of moles in 193 g
=193/100.4
=1.922 mol
=1.92 mol (rounded to 3 significant figures)
Answer:
.The concentration of N2O4(g) and the concentration of NO2(g) must be constant.
Explanation:
N2O4(g)<--------> 2NO2(g)
At equilibrium, all the concentrations of species involved in the equilibrium expression remain constant. This is because, at equilibrium, the rate of forward reaction equals the rate of reverse reaction. The concentration of the system does not change with time. The relative concentration of each specie, remain steady at equilibrium.
The answer is (3). The powdered iron and the piece iron is the same substance and is just different in the shape. So the reason is the power has larger surface area for reaction occurs.
<span>A substance that cannot be broken down to simpler substances is called a element. There are 118 different elements. A element is made from only one atom. </span><span />
I believe it’s 6km/ south