Answer:
Iron, or Fe, has 26 electrons, with two electrons in the outer valence shell. Iron is a transition metal and is both lustrous and easy to work with. Iron is also prone to rust, especially in damp environments. Iron is a ferrous metal, meaning that it can be magnetized.
Explanation:
Answer:
Explanation
Let, Wavelength = W,
Given, frequency (f) = 50 Hz, wave velocity (V) = 342 m/s
We know, V = f × W
=> 342 = 50 × W
=> W = 342/50 metre
=> W = 6.84 metre
Answer is: <span>1.6×10−9m.
</span><span>This is buffer solution, so
use Henderson–Hasselbalch equation:
</span>V(solution) = 150 mL + 150 mL = 300 mL ÷ 1000 mL/L = 0.3 L.
c(HCN) = ck = 0.15 L · 0.1 M / 0.3 L = 0.05 M.
c(NaCN) = cs = 0.15 L · 0.03 M / 0.3 M = 0.015 M.
[H⁺] = Ka · (ck/cs).
[H⁺] = 4.9·10⁻¹⁰ · (0.05 M ÷ 0.015 M).
[H⁺] = 1.63·10⁻⁹ M.
Answer:
The vapor pressure for the first solution at 20°C is 17.48 Torr.
The vapor pressure for the second solution at 20°C is 17.49 Torr.
Explanation:
1) mass of solute that is glucose = 10 g
Moles of glucose ,
Mass of water = m
Volume of water = V = 1L = 1000 mL
Density of water = 1 g/ml
Moles of water =
Vapor pressure of the solution =
Vapor pressure of the pure solvent that is water =
Mole fraction of solute=
The vapor pressure for the first solution at 20°C is 17.48 Torr.
2 ) mass of solute that is sucrose= 10 g
Moles of sucrose ,
Mass of water = m
Volume of water = V = 1L = 1000 mL
Density of water = 1 g/ml
Moles of water =
Vapor pressure of the solution =
Vapor pressure of the pure solvent that is water =
Mole fraction of solute=
The vapor pressure for the second solution at 20°C is 17.49 Torr.