We know that:
f * λ = c
<span>and
E = h*f
so,rearranging:
</span>
<span>E/h = C/λ
given:
h = </span><span>6.90 × 10^2 nm
</span><span>substituting the values:
E = </span> C/λ<span> x h
(c is the speed of light;that is 3x10^8 m/s)
</span> = 3x10^8 x 6.626x10^-34 / 6.90 x10^7m x 6.022x10^23
Hence,
using calculator:
we get,
E = 1.69 x 10^5 Joules
The greatest wind speeds as evidenced by the base velocity speed scale were bright red. In addition, the fastest wind speed not linked to tornadoes ever documented was for the duration of the passageway of tropical cyclone olivia on April 10 1996 which is an automatic weather station on barrow island australia recorded a maximum wind blast of air of 408 km/h (220 kn; 253 mph; 113 m/s).
Thermal instillation works so to me the smartest answer is a cotton sweater to keep heat in
Conversion factor : molar mass/molecular weight
Mass of H₂O produced = 72 g
<h3>Further explanation</h3>
Given
Reaction
2H2 + O2- 2H20
8 grams of H2
Required
Conversion factors
Solution
We can use the molar mass of the components and the mole ratio as conversion factors for the above equation
mol H₂ (MW = 2 g/mol) :
From the equation, mol ratio of H₂ : H₂O = 2 : 2, so mol H₂O = 4 mol
mass H₂O(MW = 18 g/mol) :
mass = mol x MW
mass = 4 x 18
mass = 72 g
